A callback that is invoked when the value of semanticsEnabled changes.
The framework invokes this callback in the same zone in which the callback was set.
Source
VoidCallback get onSemanticsEnabledChanged => _onSemanticsEnabledChanged;
Source
set onSemanticsEnabledChanged(VoidCallback callback) { _onSemanticsEnabledChanged = callback; _onSemanticsEnabledChangedZone = Zone.current; }