protected function getValue($key)
    {
        if (isset($this->_cache[$key]) && ($this->_cache[$key][1] === 0 || $this->_cache[$key][1] > microtime(true))) {
            return $this->_cache[$key][0];
        }

        return false;
    }
protected function getValue($key)
    {
        if (isset($this->_cache[$key]) && ($this->_cache[$key][1] === 0 || $this->_cache[$key][1] > microtime(true))) {
            return $this->_cache[$key][0];
        }

        return false;
    }
{@inheritdoc}