protected function _setContentTypeMemorization($value)
    {
        $found = null;
        foreach ($this->_specificOptions['memorize_headers'] as $key => $value) {
            if (strtolower($value) == 'content-type') {
                $found = $key;
            }
        }
        if ($value) {
            if (!$found) {
                $this->_specificOptions['memorize_headers'][] = 'Content-Type';
            }
        } else {
            if ($found) {
                unset($this->_specificOptions['memorize_headers'][$found]);
            }
        }
    }