code: function removeClass($className) {
  		if (!is_array($className)) {
  			$className = array($className);
  		}
  		$class = $this->class;
  		foreach ($className as $c) {
  			$class = preg_replace('`\b'.preg_quote($c).'\b`si', '', $class);
  		}
  		if ($class) {
  			$this->class = $class;
  		} else {
  			unset($this->class);
  		}
  	}
docs: Remove clas(ses)
  @param string|array $className