protected function serverParamKeyToHeaderName($key)
    {
        $name = null;
        
        if (\Jasny\str_starts_with($key, 'HTTP_')) {
            $name = $this->headerCase(substr($key, 5));
        } elseif (in_array($key, ['CONTENT_TYPE', 'CONTENT_LENGTH'])) {
            $name = $this->headerCase($key);
        }
            
        return $name;
    }