GestureSerialTapDownCallback typedef Null safety

GestureSerialTapDownCallback = void Function(SerialTapDownDetails details)

Signature used by SerialTapGestureRecognizer.onSerialTapDown for when a pointer that might cause a serial tap has contacted the screen at a particular location.

Implementation

typedef GestureSerialTapDownCallback = void Function(SerialTapDownDetails details);