onPointerUp method
      
void
onPointerUp(
    
    
- dynamic event
Implementation
void onPointerUp(event) {
  if (scope.enabled == false) return;
  if (event.pointerType == 'touch') {
    onTouchEnd(event);
  } else {
    onMouseUp();
  }
  //
  removePointer(event);
  if (_pointers.isEmpty) {
    //scope.domElement.releasePointerCapture(event.pointerId);
    scope.domElement.removeEventListener(PeripheralType.pointermove, onPointerMove);
    scope.domElement.removeEventListener(PeripheralType.pointerup, onPointerUp);
  }
}