isDestructive property
Marks the action as destructive (e.g. "Delete", "Log out").
On iOS this maps to UIAlertAction.Style.destructive, which renders the
label in the system destructive red. On the Flutter fallback it maps to
CupertinoActionSheetAction.isDestructiveAction.
Apple's Human Interface Guidelines place destructive choices at the top of the sheet. This API preserves the order you pass — reordering the list would silently break the mapping from index to value — so put the destructive action first yourself.
Implementation
final bool isDestructive;