isDestructive property
Marks the item as destructive (e.g. "Delete", "Logout", "Remove").
On iOS 14+ this applies UIMenuElement.Attributes.destructive so the
LABEL renders in the system red destructive color (not just the icon).
On iOS < 26 fallback (CupertinoActionSheet) the entry uses
isDestructiveAction: true. On iOS 13 legacy UIAlertController fallback
the action uses .destructive style.
Implementation
final bool isDestructive;