/**
  * Returns an array returned by preg_match if $pattern matches. False otherwise
  *
  * @param mixed $key
  * @param mixed $pattern
  * @return mixed
  *
  * @tag filter
  */
 function getMatched($key, $pattern)
 {
     if (!$this->keyExists($key)) {
         return false;
     }
     return Inspekt::getMatched($this->_getValue($key), $pattern);
 }