* Returns an iterator pointing to the first edge in this seam, or an end iterator if * this seam is empty. */

* Returns an iterator to the first element. */

* Sets an expectation that doPerformUndo() should be called. * When called, it will return the given `returnSuccess` value. */

* Returns the first element in this list or null if this list is empty; */

* Finds every data item in this tree whose bounding box intersects with the given ray * and returns a list of those items. * * @param ray the