code: public HttpMessage uri(final String requestUri) {
          setHeader(DynamicEndpointUriResolver.ENDPOINT_URI_HEADER_NAME, requestUri);
          setHeader(HttpMessageHeaders.HTTP_REQUEST_URI, requestUri);
          return this;
      }
docs: Sets the Http request request uri header.
  
  @param requestUri The request uri header value to use
  @return The altered HttpMessage