src/Baum/Move.php
protected function hasChange() {
    return !( $this->bound1() == $this->node->getRight() || $this->bound1() == $this->node->getLeft() );
  }
protected function hasChange() {
    return !( $this->bound1() == $this->node->getRight() || $this->bound1() == $this->node->getLeft() );
  }
Check wether there should be changes in the downward tree structure.

@return boolean