/**
* Removes all cache entries of this cache which are tagged by the specified tag.
*
* @param string $tag The tag the entries must have
* @return void
* @throws \InvalidArgumentException
* @api
*/
public function flushByTag($tag)
{
if (!$this->isValidTag($tag)) {
throw new \InvalidArgumentException('"' . $tag . '" is not a valid tag for a cache entry.', 1233057359);
}
if ($this->backend instanceof TaggableBackendInterface) {
$this->backend->flushByTag($tag);
}
}
