lib/Yucca/Component/Source/Memcached.php
public function remove(array $identifier, $shardingKey = null)
    {
        $this->getConnection()->delete($this->getCacheKey($identifier));

        return $this;
    }
public function remove(array $identifier, $shardingKey = null)
    {
        $this->getConnection()->delete($this->getCacheKey($identifier));

        return $this;
    }
@param array $identifier
@param null  $shardingKey

@return $this
@throws \Exception