gan_node_html.php
protected function filter_has($selector) {
		$s = $this->select((string) $selector, false);
		return (is_array($s) && (count($s) > 0));
	}
protected function filter_has($selector) {
		$s = $this->select((string) $selector, false);
		return (is_array($s) && (count($s) > 0));
	}
Checks if node matches css query filter ":has(s)"
@param string $selector
@return bool
@see match()
@access private