gan_node_html.php
function addClass($className) {
		if (!is_array($className)) {
			$className = array($className);
		}
		$class = $this->class;
		foreach ($className as $c) {
			if (!(preg_match('`\b'.preg_quote($c).'\b`si', $class) > 0)) {
				$class .= ' '.$c;
			}
		}
		 $this->class = trim($class);
	}
function addClass($className) {
		if (!is_array($className)) {
			$className = array($className);
		}
		$class = $this->class;
		foreach ($className as $c) {
			if (!(preg_match('`\b'.preg_quote($c).'\b`si', $class) > 0)) {
				$class .= ' '.$c;
			}
		}
		 $this->class = trim($class);
	}
Add new class(es)
@param string|array $className