gan_node_html.php
protected function filter_nlastchild($n) {
		if ($this->parent === null) {
			return false;
		} else {
			return ($this->parent->childCount(true) - $this->index(false) === (int) $n);
		}
	}
protected function filter_nlastchild($n) {
		if ($this->parent === null) {
			return false;
		} else {
			return ($this->parent->childCount(true) - $this->index(false) === (int) $n);
		}
	}
Checks if node matches css query filter ":nth-last-child(n)"
@param string $n 1-based index
@return bool
@see match()
@access private