onTapUp property Null safety

GestureTapUpCallback? onTapUp
final

A pointer that will trigger a tap with a primary button has stopped contacting the screen at a particular location.

This triggers immediately before onTap in the case of the tap gesture winning. If the tap gesture did not win, onTapCancel is called instead.

See also:

Implementation

final GestureTapUpCallback? onTapUp;