- Offset position
Override this method if this render object can be hit even if its children were not hit.
Returns true if the specified
position should be considered a hit
on this render object.
The caller is responsible for transforming
position from global
coordinates to its location relative to the origin of this RenderBox.
This RenderBox is responsible for checking whether the given position is
within its bounds.
@protected bool hitTestSelf(Offset position) => false;