customSemanticsActions property Null safety

Map<CustomSemanticsAction, VoidCallback>? customSemanticsActions

A map from each supported CustomSemanticsAction to a provided handler.

The handler associated with each custom action is called whenever a semantics action of type SemanticsAction.customAction is received. The provided argument will be an identifier used to retrieve an instance of a custom action which can then retrieve the correct handler from this map.

See also:

  • CustomSemanticsAction, for an explanation of custom actions.


final Map<CustomSemanticsAction, VoidCallback>? customSemanticsActions;