Baum\Move::bound2 PHP Method

    protected function bound2()
    {
        if (!is_null($this->_bound2)) {
            return $this->_bound2;
        }
        $this->_bound2 = $this->bound1() > $this->node->getRight() ? $this->node->getRight() + 1 : $this->node->getLeft() - 1;
        return $this->_bound2;
    }