up method Null safety

PointerUpEvent up(
  1. {Duration timeStamp = Duration.zero}
)

Create a PointerUpEvent.

By default, the time stamp on the event is Duration.zero. You can give a specific time stamp by passing the timeStamp argument.

The object is no longer usable after this method has been called.

Implementation

PointerUpEvent up({ Duration timeStamp = Duration.zero }) {
  assert(isDown);
  _isDown = false;
  return PointerUpEvent(
    timeStamp: timeStamp,
    kind: kind,
    device: _device,
    pointer: pointer,
    position: location!,
  );
}