diff --git a/.github/workflows/psalm.yml b/.github/workflows/psalm.yml
new file mode 100644
index 00000000..27091d53
--- /dev/null
+++ b/.github/workflows/psalm.yml
@@ -0,0 +1,35 @@
+# This workflow is provided via the organization template repository
+#
+# https://github.com/nextcloud/.github
+# https://docs.github.com/en/actions/learn-github-actions/sharing-workflows-with-your-organization
+
+name: Static analysis
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - main
+      - stable*
+
+jobs:
+  static-analysis:
+    runs-on: ubuntu-latest
+
+    name: Nextcloud
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Set up php
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: 7.4
+          coverage: none
+
+      - name: Install dependencies
+        run: composer i
+
+      - name: Run coding standards check
+        run: composer run psalm
diff --git a/composer.json b/composer.json
index 24cbb9ee..2ad72f68 100644
--- a/composer.json
+++ b/composer.json
@@ -34,6 +34,8 @@
     "artificial-owl/my-small-php-tools": "~23"
   },
   "require-dev": {
-    "nextcloud/coding-standard": "^1.0"
+    "nextcloud/coding-standard": "^1.0",
+    "vimeo/psalm": "^4.23",
+    "christophwurst/nextcloud": "^24.0"
   }
 }
diff --git a/composer.lock b/composer.lock
index 7b23207f..c36ef776 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,20 +4,20 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "354f1edc1475febc3f0ca48322e48ed5",
+    "content-hash": "ae2bd6e03b224dc0edd5e89cf9819596",
     "packages": [
         {
             "name": "artificial-owl/my-small-php-tools",
-            "version": "v23.0.11",
+            "version": "v23.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/ArtificialOwl/my-small-php-tools.git",
-                "reference": "45b29e1c90d47ff3e89338135243d78e82dc7b6c"
+                "reference": "0246b20ebffabcb1e929c71d3b0f221086f72db1"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/ArtificialOwl/my-small-php-tools/zipball/45b29e1c90d47ff3e89338135243d78e82dc7b6c",
-                "reference": "45b29e1c90d47ff3e89338135243d78e82dc7b6c",
+                "url": "https://api.github.com/repos/ArtificialOwl/my-small-php-tools/zipball/0246b20ebffabcb1e929c71d3b0f221086f72db1",
+                "reference": "0246b20ebffabcb1e929c71d3b0f221086f72db1",
                 "shasum": ""
             },
             "require": {
@@ -42,12 +42,294 @@
             "description": "My small PHP Tools",
             "support": {
                 "issues": "https://github.com/ArtificialOwl/my-small-php-tools/issues",
-                "source": "https://github.com/ArtificialOwl/my-small-php-tools/tree/v23.0.11"
+                "source": "https://github.com/ArtificialOwl/my-small-php-tools/tree/v23.0.2"
             },
-            "time": "2021-11-17T20:25:01+00:00"
+            "time": "2021-07-26T12:32:51+00:00"
         }
     ],
     "packages-dev": [
+        {
+            "name": "amphp/amp",
+            "version": "v2.6.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/amp.git",
+                "reference": "9d5100cebffa729aaffecd3ad25dc5aeea4f13bb"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/amp/zipball/9d5100cebffa729aaffecd3ad25dc5aeea4f13bb",
+                "reference": "9d5100cebffa729aaffecd3ad25dc5aeea4f13bb",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1",
+                "ext-json": "*",
+                "jetbrains/phpstorm-stubs": "^2019.3",
+                "phpunit/phpunit": "^7 | ^8 | ^9",
+                "psalm/phar": "^3.11@dev",
+                "react/promise": "^2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "lib/functions.php",
+                    "lib/Internal/functions.php"
+                ],
+                "psr-4": {
+                    "Amp\\": "lib"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Daniel Lowrey",
+                    "email": "rdlowrey@php.net"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Bob Weinand",
+                    "email": "bobwei9@hotmail.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                }
+            ],
+            "description": "A non-blocking concurrency framework for PHP applications.",
+            "homepage": "https://amphp.org/amp",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "awaitable",
+                "concurrency",
+                "event",
+                "event-loop",
+                "future",
+                "non-blocking",
+                "promise"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/amphp",
+                "issues": "https://github.com/amphp/amp/issues",
+                "source": "https://github.com/amphp/amp/tree/v2.6.2"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/amphp",
+                    "type": "github"
+                }
+            ],
+            "time": "2022-02-20T17:52:18+00:00"
+        },
+        {
+            "name": "amphp/byte-stream",
+            "version": "v1.8.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/byte-stream.git",
+                "reference": "acbd8002b3536485c997c4e019206b3f10ca15bd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/acbd8002b3536485c997c4e019206b3f10ca15bd",
+                "reference": "acbd8002b3536485c997c4e019206b3f10ca15bd",
+                "shasum": ""
+            },
+            "require": {
+                "amphp/amp": "^2",
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1.4",
+                "friendsofphp/php-cs-fixer": "^2.3",
+                "jetbrains/phpstorm-stubs": "^2019.3",
+                "phpunit/phpunit": "^6 || ^7 || ^8",
+                "psalm/phar": "^3.11.4"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "lib/functions.php"
+                ],
+                "psr-4": {
+                    "Amp\\ByteStream\\": "lib"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                }
+            ],
+            "description": "A stream abstraction to make working with non-blocking I/O simple.",
+            "homepage": "http://amphp.org/byte-stream",
+            "keywords": [
+                "amp",
+                "amphp",
+                "async",
+                "io",
+                "non-blocking",
+                "stream"
+            ],
+            "support": {
+                "irc": "irc://irc.freenode.org/amphp",
+                "issues": "https://github.com/amphp/byte-stream/issues",
+                "source": "https://github.com/amphp/byte-stream/tree/v1.8.1"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/amphp",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-03-30T17:13:30+00:00"
+        },
+        {
+            "name": "christophwurst/nextcloud",
+            "version": "v24.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/ChristophWurst/nextcloud_composer.git",
+                "reference": "f032acdff1502a7323f95a6524d163290f43b446"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/ChristophWurst/nextcloud_composer/zipball/f032acdff1502a7323f95a6524d163290f43b446",
+                "reference": "f032acdff1502a7323f95a6524d163290f43b446",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^7.4 || ~8.0 || ~8.1",
+                "psr/container": "^1.1.1",
+                "psr/event-dispatcher": "^1.0",
+                "psr/log": "^1.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "24.0.0-dev"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "AGPL-3.0-or-later"
+            ],
+            "authors": [
+                {
+                    "name": "Christoph Wurst",
+                    "email": "christoph@winzerhof-wurst.at"
+                }
+            ],
+            "description": "Composer package containing Nextcloud's public API (classes, interfaces)",
+            "support": {
+                "issues": "https://github.com/ChristophWurst/nextcloud_composer/issues",
+                "source": "https://github.com/ChristophWurst/nextcloud_composer/tree/v24.0.1"
+            },
+            "time": "2022-06-02T14:16:47+00:00"
+        },
+        {
+            "name": "composer/package-versions-deprecated",
+            "version": "1.11.99.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/composer/package-versions-deprecated.git",
+                "reference": "b4f54f74ef3453349c24a845d22392cd31e65f1d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/composer/package-versions-deprecated/zipball/b4f54f74ef3453349c24a845d22392cd31e65f1d",
+                "reference": "b4f54f74ef3453349c24a845d22392cd31e65f1d",
+                "shasum": ""
+            },
+            "require": {
+                "composer-plugin-api": "^1.1.0 || ^2.0",
+                "php": "^7 || ^8"
+            },
+            "replace": {
+                "ocramius/package-versions": "1.11.99"
+            },
+            "require-dev": {
+                "composer/composer": "^1.9.3 || ^2.0@dev",
+                "ext-zip": "^1.13",
+                "phpunit/phpunit": "^6.5 || ^7"
+            },
+            "type": "composer-plugin",
+            "extra": {
+                "class": "PackageVersions\\Installer",
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "PackageVersions\\": "src/PackageVersions"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com"
+                },
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be"
+                }
+            ],
+            "description": "Composer plugin that provides efficient querying for installed package versions (no runtime IO)",
+            "support": {
+                "issues": "https://github.com/composer/package-versions-deprecated/issues",
+                "source": "https://github.com/composer/package-versions-deprecated/tree/1.11.99.5"
+            },
+            "funding": [
+                {
+                    "url": "https://packagist.com",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/composer",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/composer/composer",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2022-01-17T14:14:24+00:00"
+        },
         {
             "name": "composer/pcre",
             "version": "3.0.0",
@@ -266,18 +548,55 @@
             ],
             "time": "2022-02-25T21:32:43+00:00"
         },
+        {
+            "name": "dnoegel/php-xdg-base-dir",
+            "version": "v0.1.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/dnoegel/php-xdg-base-dir.git",
+                "reference": "8f8a6e48c5ecb0f991c2fdcf5f154a47d85f9ffd"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/dnoegel/php-xdg-base-dir/zipball/8f8a6e48c5ecb0f991c2fdcf5f154a47d85f9ffd",
+                "reference": "8f8a6e48c5ecb0f991c2fdcf5f154a47d85f9ffd",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~7.0|~6.0|~5.0|~4.8.35"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "XdgBaseDir\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "description": "implementation of xdg base directory specification for php",
+            "support": {
+                "issues": "https://github.com/dnoegel/php-xdg-base-dir/issues",
+                "source": "https://github.com/dnoegel/php-xdg-base-dir/tree/v0.1.1"
+            },
+            "time": "2019-12-04T15:06:13+00:00"
+        },
         {
             "name": "doctrine/annotations",
-            "version": "1.13.3",
+            "version": "1.13.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/doctrine/annotations.git",
-                "reference": "648b0343343565c4a056bfc8392201385e8d89f0"
+                "reference": "5b668aef16090008790395c02c893b1ba13f7e08"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/annotations/zipball/648b0343343565c4a056bfc8392201385e8d89f0",
-                "reference": "648b0343343565c4a056bfc8392201385e8d89f0",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/5b668aef16090008790395c02c893b1ba13f7e08",
+                "reference": "5b668aef16090008790395c02c893b1ba13f7e08",
                 "shasum": ""
             },
             "require": {
@@ -289,10 +608,9 @@
             "require-dev": {
                 "doctrine/cache": "^1.11 || ^2.0",
                 "doctrine/coding-standard": "^6.0 || ^8.1",
-                "phpstan/phpstan": "^1.4.10 || ^1.8.0",
+                "phpstan/phpstan": "^0.12.20",
                 "phpunit/phpunit": "^7.5 || ^8.0 || ^9.1.5",
-                "symfony/cache": "^4.4 || ^5.2",
-                "vimeo/psalm": "^4.10"
+                "symfony/cache": "^4.4 || ^5.2"
             },
             "type": "library",
             "autoload": {
@@ -335,9 +653,9 @@
             ],
             "support": {
                 "issues": "https://github.com/doctrine/annotations/issues",
-                "source": "https://github.com/doctrine/annotations/tree/1.13.3"
+                "source": "https://github.com/doctrine/annotations/tree/1.13.2"
             },
-            "time": "2022-07-02T10:48:51+00:00"
+            "time": "2021-08-05T19:00:23+00:00"
         },
         {
             "name": "doctrine/lexer",
@@ -415,18 +733,119 @@
             ],
             "time": "2022-02-28T11:07:21+00:00"
         },
+        {
+            "name": "felixfbecker/advanced-json-rpc",
+            "version": "v3.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-advanced-json-rpc.git",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-advanced-json-rpc/zipball/b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "reference": "b5f37dbff9a8ad360ca341f3240dc1c168b45447",
+                "shasum": ""
+            },
+            "require": {
+                "netresearch/jsonmapper": "^1.0 || ^2.0 || ^3.0 || ^4.0",
+                "php": "^7.1 || ^8.0",
+                "phpdocumentor/reflection-docblock": "^4.3.4 || ^5.0.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^7.0 || ^8.0"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "AdvancedJsonRpc\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "A more advanced JSONRPC implementation",
+            "support": {
+                "issues": "https://github.com/felixfbecker/php-advanced-json-rpc/issues",
+                "source": "https://github.com/felixfbecker/php-advanced-json-rpc/tree/v3.2.1"
+            },
+            "time": "2021-06-11T22:34:44+00:00"
+        },
+        {
+            "name": "felixfbecker/language-server-protocol",
+            "version": "v1.5.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/felixfbecker/php-language-server-protocol.git",
+                "reference": "6e82196ffd7c62f7794d778ca52b69feec9f2842"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/felixfbecker/php-language-server-protocol/zipball/6e82196ffd7c62f7794d778ca52b69feec9f2842",
+                "reference": "6e82196ffd7c62f7794d778ca52b69feec9f2842",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "phpstan/phpstan": "*",
+                "squizlabs/php_codesniffer": "^3.1",
+                "vimeo/psalm": "^4.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "LanguageServerProtocol\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "ISC"
+            ],
+            "authors": [
+                {
+                    "name": "Felix Becker",
+                    "email": "felix.b@outlook.com"
+                }
+            ],
+            "description": "PHP classes for the Language Server Protocol",
+            "keywords": [
+                "language",
+                "microsoft",
+                "php",
+                "server"
+            ],
+            "support": {
+                "issues": "https://github.com/felixfbecker/php-language-server-protocol/issues",
+                "source": "https://github.com/felixfbecker/php-language-server-protocol/tree/v1.5.2"
+            },
+            "time": "2022-03-02T22:36:06+00:00"
+        },
         {
             "name": "friendsofphp/php-cs-fixer",
-            "version": "v3.9.5",
+            "version": "v3.8.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/FriendsOfPHP/PHP-CS-Fixer.git",
-                "reference": "4465d70ba776806857a1ac2a6f877e582445ff36"
+                "reference": "cbad1115aac4b5c3c5540e7210d3c9fba2f81fa3"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/4465d70ba776806857a1ac2a6f877e582445ff36",
-                "reference": "4465d70ba776806857a1ac2a6f877e582445ff36",
+                "url": "https://api.github.com/repos/FriendsOfPHP/PHP-CS-Fixer/zipball/cbad1115aac4b5c3c5540e7210d3c9fba2f81fa3",
+                "reference": "cbad1115aac4b5c3c5540e7210d3c9fba2f81fa3",
                 "shasum": ""
             },
             "require": {
@@ -464,17 +883,325 @@
                 "symfony/phpunit-bridge": "^6.0",
                 "symfony/yaml": "^5.4 || ^6.0"
             },
-            "suggest": {
-                "ext-dom": "For handling output formats in XML",
-                "ext-mbstring": "For handling non-UTF8 characters."
+            "suggest": {
+                "ext-dom": "For handling output formats in XML",
+                "ext-mbstring": "For handling non-UTF8 characters."
+            },
+            "bin": [
+                "php-cs-fixer"
+            ],
+            "type": "application",
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+            "version": "v2.5.1",
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@@ -942,7 +1747,7 @@
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             "homepage": "https://symfony.com",
             "support": {
-                "source": "https://github.com/symfony/deprecation-contracts/tree/v2.5.2"
+                "source": "https://github.com/symfony/deprecation-contracts/tree/v2.5.1"
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@@ -1047,7 +1852,7 @@
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+            "version": "v2.5.1",
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                 "url": "https://github.com/symfony/event-dispatcher-contracts.git",
@@ -1106,7 +1911,7 @@
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-                "source": "https://github.com/symfony/event-dispatcher-contracts/tree/v2.5.2"
+                "source": "https://github.com/symfony/event-dispatcher-contracts/tree/v2.5.1"
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@@ -1955,16 +2760,16 @@
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-            "version": "v2.5.2",
+            "version": "v2.5.1",
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                 "url": "https://github.com/symfony/service-contracts.git",
-                "reference": "4b426aac47d6427cc1a1d0f7e2ac724627f5966c"
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@@ -2018,7 +2823,7 @@
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-                "source": "https://github.com/symfony/service-contracts/tree/v2.5.2"
+                "source": "https://github.com/symfony/service-contracts/tree/v2.5.1"
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@@ -2034,7 +2839,7 @@
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                 }
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-            "time": "2022-05-30T19:17:29+00:00"
+            "time": "2022-03-13T20:07:29+00:00"
         },
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             "name": "symfony/stopwatch",
@@ -2100,16 +2905,16 @@
         },
         {
             "name": "symfony/string",
-            "version": "v5.4.10",
+            "version": "v5.4.9",
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                 "url": "https://github.com/symfony/string.git",
-                "reference": "4432bc7df82a554b3e413a8570ce2fea90e94097"
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-                "reference": "4432bc7df82a554b3e413a8570ce2fea90e94097",
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@@ -2166,7 +2971,7 @@
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             "support": {
-                "source": "https://github.com/symfony/string/tree/v5.4.10"
+                "source": "https://github.com/symfony/string/tree/v5.4.9"
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                 {
@@ -2182,7 +2987,223 @@
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                 }
             ],
-            "time": "2022-06-26T15:57:47+00:00"
+            "time": "2022-04-19T10:40:37+00:00"
+        },
+        {
+            "name": "vimeo/psalm",
+            "version": "4.23.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/vimeo/psalm.git",
+                "reference": "f1fe6ff483bf325c803df9f510d09a03fd796f88"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/f1fe6ff483bf325c803df9f510d09a03fd796f88",
+                "reference": "f1fe6ff483bf325c803df9f510d09a03fd796f88",
+                "shasum": ""
+            },
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+                "amphp/byte-stream": "^1.5",
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+                "composer/semver": "^1.4 || ^2.0 || ^3.0",
+                "composer/xdebug-handler": "^1.1 || ^2.0 || ^3.0",
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+                "ext-dom": "*",
+                "ext-json": "*",
+                "ext-libxml": "*",
+                "ext-mbstring": "*",
+                "ext-simplexml": "*",
+                "ext-tokenizer": "*",
+                "felixfbecker/advanced-json-rpc": "^3.0.3",
+                "felixfbecker/language-server-protocol": "^1.5",
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+                "openlss/lib-array2xml": "^1.0",
+                "php": "^7.1|^8",
+                "sebastian/diff": "^3.0 || ^4.0",
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+                "symfony/polyfill-php80": "^1.25",
+                "webmozart/path-util": "^2.3"
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+            "provide": {
+                "psalm/psalm": "self.version"
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+                "phpspec/prophecy": ">=1.9.0",
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+                "psalm/plugin-phpunit": "^0.16",
+                "slevomat/coding-standard": "^7.0",
+                "squizlabs/php_codesniffer": "^3.5",
+                "symfony/process": "^4.3 || ^5.0 || ^6.0",
+                "weirdan/prophecy-shim": "^1.0 || ^2.0"
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+            "suggest": {
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+                "ext-igbinary": "^2.0.5 is required, used to serialize caching data"
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+            "bin": [
+                "psalm",
+                "psalm-language-server",
+                "psalm-plugin",
+                "psalm-refactor",
+                "psalter"
+            ],
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+            "extra": {
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+                    "dev-3.x": "3.x-dev",
+                    "dev-2.x": "2.x-dev",
+                    "dev-1.x": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "files": [
+                    "src/functions.php",
+                    "src/spl_object_id.php"
+                ],
+                "psr-4": {
+                    "Psalm\\": "src/Psalm/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Matthew Brown"
+                }
+            ],
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+            "keywords": [
+                "code",
+                "inspection",
+                "php"
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+            "support": {
+                "issues": "https://github.com/vimeo/psalm/issues",
+                "source": "https://github.com/vimeo/psalm/tree/4.23.0"
+            },
+            "time": "2022-04-28T17:35:49+00:00"
+        },
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+            "version": "1.11.0",
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+                "url": "https://github.com/webmozarts/assert.git",
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+                "shasum": ""
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+            "require": {
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+                "php": "^7.2 || ^8.0"
+            },
+            "conflict": {
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+            },
+            "require-dev": {
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+            "extra": {
+                "branch-alias": {
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+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\Assert\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "Assertions to validate method input/output with nice error messages.",
+            "keywords": [
+                "assert",
+                "check",
+                "validate"
+            ],
+            "support": {
+                "issues": "https://github.com/webmozarts/assert/issues",
+                "source": "https://github.com/webmozarts/assert/tree/1.11.0"
+            },
+            "time": "2022-06-03T18:03:27+00:00"
+        },
+        {
+            "name": "webmozart/path-util",
+            "version": "2.3.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/webmozart/path-util.git",
+                "reference": "d939f7edc24c9a1bb9c0dee5cb05d8e859490725"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/webmozart/path-util/zipball/d939f7edc24c9a1bb9c0dee5cb05d8e859490725",
+                "reference": "d939f7edc24c9a1bb9c0dee5cb05d8e859490725",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3",
+                "webmozart/assert": "~1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^4.6",
+                "sebastian/version": "^1.0.1"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Webmozart\\PathUtil\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@gmail.com"
+                }
+            ],
+            "description": "A robust cross-platform utility for normalizing, comparing and modifying file paths.",
+            "support": {
+                "issues": "https://github.com/webmozart/path-util/issues",
+                "source": "https://github.com/webmozart/path-util/tree/2.3.0"
+            },
+            "abandoned": "symfony/filesystem",
+            "time": "2015-12-17T08:42:14+00:00"
         }
     ],
     "aliases": [],
@@ -2192,8 +3213,5 @@
     "prefer-lowest": false,
     "platform": [],
     "platform-dev": [],
-    "platform-overrides": {
-        "php": "7.4"
-    },
-    "plugin-api-version": "2.0.0"
+    "plugin-api-version": "2.1.0"
 }
diff --git a/psalm.xml b/psalm.xml
new file mode 100644
index 00000000..c76ca63b
--- /dev/null
+++ b/psalm.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<psalm
+	errorLevel="5"
+	resolveFromConfigFile="true"
+	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+	xmlns="https://getpsalm.org/schema/config"
+	xsi:schemaLocation="https://getpsalm.org/schema/config vendor/vimeo/psalm/config.xsd"
+	errorBaseline="tests/psalm-baseline.xml"
+>
+	<projectFiles>
+		<directory name="lib" />
+		<ignoreFiles>
+			<directory name="vendor" />
+		</ignoreFiles>
+	</projectFiles>
+	<extraFiles>
+		<directory name="vendor" />
+	</extraFiles>
+</psalm>
diff --git a/tests/psalm-baseline.xml b/tests/psalm-baseline.xml
new file mode 100644
index 00000000..d9b8b7df
--- /dev/null
+++ b/tests/psalm-baseline.xml
@@ -0,0 +1,3 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<files>
+</files>