Get all objects is not implemented

[jimseld]

Calls which can return object collections are not implemented.

For example, to get all projects, the URL is /api/v4/projects, which translates to:
client.Projects.Get()

However, the current implementation requires a project id number or name, and disallows having no arguments. This issue may be on other objects too; I see that some have an All() method, but why not just have Get() without arguments, which is syntactically like the Gitlab API?