public static Upstreams newUpstreamsBuilder(final String url) {
        return Upstreams.builder().add(newUpstream(url)).build();
    }
new upstream builder.

@param url url
@return Upstreams
shenyu-e2e/shenyu-e2e-common/src/main/java/org/apache/shenyu/e2e/template/ResourceDataTemplate.java