/**
  * Give (if possible) an extra lifetime to the given cache id
  *
  * @param string $id cache id
  * @param int $extraLifetime
  * @return boolean true if ok
  */
 public function touch($id, $extraLifetime)
 {
     return $this->_slowBackend->touch($id, $extraLifetime);
 }
 /**
  * Give (if possible) an extra lifetime to the given cache id
  *
  * @param string $cacheId cache id
  * @param int $extraLifetime
  * @return boolean true if ok
  */
 public function touch($cacheId, $extraLifetime)
 {
     return $this->_backend->touch($cacheId, $extraLifetime);
 }