public function apply()
    {
        if ($this->config->hasKey(self::REMOVE)) {
            $removeConfig = $this->config->getSubConfig(self::REMOVE);
            $this->remove($removeConfig->getArrayCopy());
        }

        if ($this->config->hasKey(self::ADD)) {
            $addConfig = $this->config->getSubConfig(self::ADD);
            $this->add($addConfig->getArrayCopy());
        }
    }