getItems(array $keys = array()) {@inheritdoc}

saveDeferred(CacheItemInterface $item) {@inheritdoc}

deleteItem($key) {@inheritdoc} Parameters

deleteItems(array $keys) {@inheritdoc} Parameters

deleteItem($key) {@inheritdoc} Parameters

class FilesystemAdapter extends

class CacheItem implements CacheItemInterface Methods

commit() {@inheritdoc}

clear() {@inheritdoc}

static validateKey(string $key) Validates a cache key according to PSR-6.