code: public RestTemplateBuilder uriTemplateHandler(UriTemplateHandler uriTemplateHandler) {
  		Assert.notNull(uriTemplateHandler, "UriTemplateHandler must not be null");
  		return new RestTemplateBuilder(this.detectRequestFactory, this.rootUri,
  				this.messageConverters, this.requestFactorySupplier, uriTemplateHandler,
  				this.errorHandler, this.basicAuthentication, this.restTemplateCustomizers,
  				this.requestFactoryCustomizer, this.interceptors);
  	}
docs: Set the {@link UriTemplateHandler} that should be used with the
  {@link RestTemplate}.
  @param uriTemplateHandler the URI template handler to use
  @return a new builder instance