public void verifyNever(HttpMethod method, String url) {
    RequestKey requestKey = RequestKey.builder(method, url).build();
    if (requests.containsKey(requestKey)) {
      throw new VerificationAssertionError("Do not wanted: '%s' but was invoked!", requestKey);
    }
  }
@deprecated use {@link #add(HttpMethod, String, feign.Response.Builder)} instead
mock/src/main/java/feign/mock/MockClient.java