public function isInformational(): bool
    {
        return $this->statusCode >= StatusCode::CONTINUE
            && $this->statusCode < StatusCode::OK;
    }
public function isInformational(): bool
    {
        return $this->statusCode >= StatusCode::CONTINUE
            && $this->statusCode < StatusCode::OK;
    }
public function isInformational ( ) : bool { return $ this -> statusCode >= StatusCode :: CONTINUE && $ this -> statusCode < StatusCode :: OK ; }
Is response informative?

@return bool
Is response informative?