Evaluates this display object to see if the coordinates localX and
localY are inside this display object.
If the coordinates are inside, this display object is returned; null otherwise.
localX and localY are relative to to the origin (0,0) of this
display object (local coordinates).
Source
DisplayObject hitTestInput(num localX, num localY) {
return this.bounds.contains(localX, localY) ? this : null;
}