commit() {@inheritdoc}

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

class CacheItem implements CacheItemInterface Methods

deleteItem($key) {@inheritdoc} Parameters

commit() {@inheritdoc}

class ChainAdapter implements

saveDeferred(CacheItemInterface $item) {@inheritdoc}

deleteItem($key) {@inheritdoc} Parameters

class FilesystemAdapter extends

saveDeferred(CacheItemInterface $item) {@inheritdoc}