The following warnings presented themselves when the Document groups example code is built from the App essentials in SwiftUI session.
Interestingly, the warning does not return if the "Supports opening documents in place" and "Exported Type Identifier" info.plist entries are removed. Xcode seems to be hanging on to the bones of the "Exported Type Identifier" which can be seen when a commit is initiated with Xcode Source Control.
And another "purple" warning:warning: The application supports opening files, but doesn't declare whether it supports opening them in place. You can add an LSSupportsOpeningDocumentsInPlace entry or an UISupportsDocumentBrowser entry to your Info.plist to declare support. (in target 'NewInSwiftUI' from project 'NewInSwiftUI')
After adding the "Supports opening documents in place" info.plist entry and an "Exported Type Identifier" to the project target, the warning goes away whether this boolean is set to Yes or No. What does this plist entry do (apart from the obvious)?Multiline Type "com.example.ShapeEdit.shapes" was expected to be declared and exported in the Info.plist of NewInSwiftUI.app, but it was not found.
Interestingly, the warning does not return if the "Supports opening documents in place" and "Exported Type Identifier" info.plist entries are removed. Xcode seems to be hanging on to the bones of the "Exported Type Identifier" which can be seen when a commit is initiated with Xcode Source Control.