Neos\Cache\Frontend\FrontendInterface::getIdentifier PHP Method

    public function getIdentifier();

 /**
  * Registers a cache so it can be retrieved at a later point.
  *
  * @param FrontendInterface $cache The cache frontend to be registered
  * @param bool $persistent
  * @return void
  * @throws DuplicateIdentifierException if a cache with the given identifier has already been registered.
  * @api
  */
 public function registerCache(FrontendInterface $cache, $persistent = false)
 {
     $identifier = $cache->getIdentifier();
     if (isset($this->caches[$identifier])) {
         throw new DuplicateIdentifierException('A cache with identifier "' . $identifier . '" has already been registered.', 1203698223);
     }
     $this->caches[$identifier] = $cache;
     if ($persistent === true) {
         $this->persistentCaches[$identifier] = $cache;
     }
 }