GestureSerialTapCancelCallback typedef Null safety

GestureSerialTapCancelCallback = void Function(SerialTapCancelDetails details)

Signature used by SerialTapGestureRecognizer.onSerialTapCancel for when a pointer that previously triggered a GestureSerialTapDownCallback will not end up completing the serial tap.

Implementation

typedef GestureSerialTapCancelCallback = void Function(SerialTapCancelDetails details);