Lightning Examples Dev, Build and Test clone: git clone https://github.com/pogilvie/LightningExamples.git cd LightningExamples/ sfdx force:org:create -s -a lex edition=enterprise sfdx force:source:push Lightning Data Service and master record rollup up summary fields Rollup.cmp sfdx force:org:push make md_setup navigate to the 'Masters' tab finding: recordUpdated events are not generated for changes to rollup summary fields Native Lookups with lightning:recordEditForm RecordEditForm.cmp <lightning:inputField fieldName="AccountId" /> to implement a lookup field Demonstration of the Builder paradigm for constructing test objects. http://www.natpryce.com/articles/000714.html Class AccountBuilder.cls Class ContactBuilder.cls Requirements.builder (sfdx force:apex:test:run -t Requirements.builder -w 10 -u lex) Arrays and Parent Child components The parent creats an array element for each child what happends when the child updates its element?