code: public static void next(HttpServerExchange httpServerExchange, HttpHandler next) throws Exception {
  		if (next != null) {
  			next.handleRequest(httpServerExchange);
  		} else {
  			next(httpServerExchange);
  		}
  	}
docs: Go to the next handler if the given next is none null. Reason for this is for
  middleware to provide their instance next if it exists. Since if it exists,
  the server hasn't been able to find the handler.yml.
  
  @param httpServerExchange
  The current requests server exchange.
  @param next
  The next HttpHandler to go to if it's not null.
  @throws Exception exception