code: public Observable<NextHopResultInner> getNextHopAsync(String resourceGroupName, String networkWatcherName, NextHopParameters parameters) {
          return getNextHopWithServiceResponseAsync(resourceGroupName, networkWatcherName, parameters).map(new Func1<ServiceResponse<NextHopResultInner>, NextHopResultInner>() {
              @Override
              public NextHopResultInner call(ServiceResponse<NextHopResultInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets the next hop from the specified VM.
  
  @param resourceGroupName The name of the resource group.
  @param networkWatcherName The name of the network watcher.
  @param parameters Parameters that define the source and destination endpoint.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable for the request