An array of keys to add to the cache on service termination. Type:

public CacheBackendInterface::set($cid, $data, $expire

protected DatabaseBackend::ensureBinExists()

protected DatabaseBackend::normalizeCid($cid)

public ApcuBackend::getMultiple(&$cids, $allow_invalid = FALSE)

public MemoryBackend::getMultiple(&$cids, $allow_invalid = FALSE)

The consistent cache backend. Type:

public CacheContextInterface::getCacheableMetadata()

Array to store cache objects. File core/lib/Drupal/Core/Cache/PhpBackend.php, line 31

public NullBackend::getMultiple(&$cids, $allow_invalid = FALSE)