code: public Observable<VerificationIPFlowResultInner> verifyIPFlowAsync(String resourceGroupName, String networkWatcherName, VerificationIPFlowParameters parameters) {
          return verifyIPFlowWithServiceResponseAsync(resourceGroupName, networkWatcherName, parameters).map(new Func1<ServiceResponse<VerificationIPFlowResultInner>, VerificationIPFlowResultInner>() {
              @Override
              public VerificationIPFlowResultInner call(ServiceResponse<VerificationIPFlowResultInner> response) {
                  return response.body();
              }
          });
      }
docs: Verify IP flow from the specified VM to a location given the currently configured NSG rules.
  
  @param resourceGroupName The name of the resource group.
  @param networkWatcherName The name of the network watcher.
  @param parameters Parameters that define the IP flow to be verified.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request