public function sendResponseHttpHeaders(ResponseInterface $response):void
    {
        // checking
        if (headers_sent()) {
            throw new ResponseSenderException("A response has already been sent to the web browser",
                $this);
        }

        // removing PHP native HTTP headers (if enabled)
        if ($this->removePhpHttpHeaders) {
            foreach (headers_list() as $header) {
                header_remove(explode(":", $header)[0]);
            }
        }

        // sending response HTTP headers
        $this->sendHttpVersionHeader(
            $response->getProtocolVersion(),
            $response->getStatusCode(),
            $response->getReasonPhrase()
        );
        $this->sendHttpHeaders($this->listResponseHeaders($response));
    }