allowedDefaultActions property
Controls which system-provided actions appear in the text selection menu.
If null (the default), all platform defaults are shown (Copy, Share, etc.).
If an empty set, only custom selectionActions are shown.
Otherwise, only the specified system actions are included.
Note: DefaultSelectionAction.translate is iOS-only; DefaultSelectionAction.selectAll is Android-only. Unsupported values for a platform are silently ignored.
Implementation
final Set<DefaultSelectionAction>? allowedDefaultActions;