src/Valkyrja/HttpMessage/NativeResponse.php
public function send(): Response
    {
        $http_line = sprintf(
            'HTTP/%s %s %s',
            $this->getProtocolVersion(),
            $this->getStatusCode(),
            $this->getReasonPhrase()
        );

        header($http_line, true, $this->getStatusCode());

        foreach ($this->getHeaders() as $name => $values) {
            /** @var array $values */
            foreach ($values as $value) {
                header("$name: $value", false);
            }
        }

        $stream = $this->getBody();

        if ($stream->isSeekable()) {
            $stream->rewind();
        }

        while (! $stream->eof()) {
            echo $stream->read(1024 * 8);
        }

        return $this;
    }
public function send(): Response
    {
        $http_line = sprintf(
            'HTTP/%s %s %s',
            $this->getProtocolVersion(),
            $this->getStatusCode(),
            $this->getReasonPhrase()
        );

        header($http_line, true, $this->getStatusCode());

        foreach ($this->getHeaders() as $name => $values) {
            /** @var array $values */
            foreach ($values as $value) {
                header("$name: $value", false);
            }
        }

        $stream = $this->getBody();

        if ($stream->isSeekable()) {
            $stream->rewind();
        }

        while (! $stream->eof()) {
            echo $stream->read(1024 * 8);
        }

        return $this;
    }
Send the response.

@throws \RuntimeException

@return Response