Add new sorting and grouping API.
Add new sorting and grouping API to LegacyDcaDataDefinitionBuilder.
Fix type hints.
Add missing phpDoc.
Cleanup imports.
Deprecate method parsePanelSort().
Utilize new sorting and grouping API.
Bugfix: Default sorting and grouping was not correctly determined.
Code cleanup.
Remove checks for deprecated isClosed().
Remove TODO entries for deprecating isClosed().
Invert logic of isClosed() and setClosed() to restore correct behaviour.
Display correct mode information in error message.
Code style.
Fix: work around deprecated $event->getDispatcher().
Refactor: another isClosed()/setClosed() instance.
Code style.
Another isClosed() instance removed.
Remove unused parameters.
Code style.