code: public Observable<String> generateUriAsync(String resourceGroupName, String automationAccountName) {
          return generateUriWithServiceResponseAsync(resourceGroupName, automationAccountName).map(new Func1<ServiceResponse<String>, String>() {
              @Override
              public String call(ServiceResponse<String> response) {
                  return response.body();
              }
          });
      }
docs: Generates a Uri for use in creating a webhook.
  
  @param resourceGroupName Name of an Azure Resource group.
  @param automationAccountName The name of the automation account.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the String object