TYPO3 Core

Hello!
When i understand it correctly, the chapter "Add finisher to backend UI" has to change, because this is deprectaed:

__inheritances:
10: 'mixins.formElementMixins.BaseCollectionEditorsMixin'

It has to be changed to (i guess :D):
100:
identifier: header
templateName: Inspector-CollectionElementHeaderEditor
label: "Custom Finisher"
110:
identifier: 'customField'
templateName: 'Inspector-TextEditor'
label: 'Custom Field'
propertyPath: 'options.customField'
propertyValidators:
10: 'NotEmpty' # email field
120:
identifier: 'email'
templateName: 'Inspector-TextEditor'
label: 'Subscribers email'
propertyPath: 'options.email'
enableFormelementSelectionButton: true
propertyValidators:
10: 'NotEmpty'
20: 'FormElementIdentifierWithinCurlyBracesInclusive'
9999:
identifier: removeButton
templateName: Inspector-RemoveElementEditor

Thanks and best regards
Kai