initializeRegistry example

// @todo: Implement lazy-loading.     $this->cacheLoaded = TRUE;

    if ($this->persistable && $cached = $this->cache->get($this->cid)) {
      $this->storage = $cached->data;
    }
    else {
      // If there is no runtime cache stored, fetch the full theme registry,       // but then initialize each value to NULL. This allows offsetExists()       // to function correctly on non-registered theme hooks without triggering       // a call to resolveCacheMiss().       $this->storage = $this->initializeRegistry();
      foreach (array_keys($this->storage) as $key) {
        $this->persist($key);
      }
      // RegistryTest::testRaceCondition() ensures that the cache entry is       // written on the initial construction of the theme registry.       $this->updateCache();
    }
  }

  /** * Initializes the full theme registry. * * @return array * An array with the keys of the full theme registry, but the values * initialized to NULL. */