/**
  * Get time for key.
  *
  * @param string $key
  *
  * @return \DateTime
  */
 public function get($key)
 {
     if (!($time = $this->driver->get($key))) {
         if ($key == self::LAST_UPDATE_KEY) {
             $time = $this->reset();
         } else {
             $time = $this->get(self::LAST_UPDATE_KEY);
         }
     }
     return $time;
 }