code: public static WebFluxBuilder linkTo(Object invocation, ServerWebExchange exchange) {
  		return new WebFluxBuilder(linkToInternal(invocation, Mono.just(getBuilder(exchange))));
  	}
docs: Create a {@link WebFluxLinkBuilder} using an explicitly defined {@link ServerWebExchange}. This is possible if your
  WebFlux method includes the exchange and you want to pass it straight in.
  
  @param invocation must not be {@literal null}.
  @param exchange must not be {@literal null}.