function writeToStream$6(dest, instance) {
	const body = instance.body;


	if (body === null) {
		// body is null
		dest.end();
	} else if (isBlob$6(body)) {
		body.stream().pipe(dest);
	} else if (Buffer.isBuffer(body)) {
		// body is buffer
		dest.write(body);
		dest.end();
	} else {
		// body is stream
		body.pipe(dest);
	}
}
Write a Body to a Node.js WritableStream (e.g. http.Request) object.

@param   Body    instance   Instance of Body
@return  Void