public static HttpRequestBuilderWithoutBodySupport Get(this UntypedHttpRequestBuilder requestBuilder, string address)
 => new HttpRequestBuilderWithoutBodySupport(requestBuilder.Client, HttpMethod.Get, address, Enumerable.Empty <HttpHeader>());
 public static HttpRequestBuilder Patch(this UntypedHttpRequestBuilder requestBuilder, string address)
 => new HttpRequestBuilder(requestBuilder.Client, new HttpMethod("PATCH"), address, Enumerable.Empty <HttpHeader>());
 public static HttpRequestBuilder Custom(this UntypedHttpRequestBuilder requestBuilder, string method, string address)
 => new HttpRequestBuilder(requestBuilder.Client, new HttpMethod(method), address, Enumerable.Empty <HttpHeader>());
 public static HttpRequestBuilder Put(this UntypedHttpRequestBuilder requestBuilder, string address)
 => new HttpRequestBuilder(requestBuilder.Client, HttpMethod.Put, address, Enumerable.Empty <HttpHeader>());