code: public Observable<CallbackUrlInner> getCallbackUrlAsync(String resourceGroupName, String integrationAccountName, GetCallbackUrlParameters parameters) {
          return getCallbackUrlWithServiceResponseAsync(resourceGroupName, integrationAccountName, parameters).map(new Func1<ServiceResponse<CallbackUrlInner>, CallbackUrlInner>() {
              @Override
              public CallbackUrlInner call(ServiceResponse<CallbackUrlInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets the integration account callback URL.
  
  @param resourceGroupName The resource group name.
  @param integrationAccountName The integration account name.
  @param parameters The callback URL parameters.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the CallbackUrlInner object