onTertiaryTapUp property Null safety
A pointer that will trigger a tap with a tertiary button has stopped contacting the screen at a particular location.
This triggers in the case of the tap gesture winning. If the tap gesture did not win, onTertiaryTapCancel is called instead.
- kTertiaryButton, the button this callback responds to.
final GestureTapUpCallback? onTertiaryTapUp;