code: public ServiceFuture<List<EventSubscriptionInner>> listGlobalByResourceGroupForTopicTypeAsync(String resourceGroupName, String topicTypeName, final ServiceCallback<List<EventSubscriptionInner>> serviceCallback) {
          return ServiceFuture.fromResponse(listGlobalByResourceGroupForTopicTypeWithServiceResponseAsync(resourceGroupName, topicTypeName), serviceCallback);
      }
docs: List all global event subscriptions under a resource group for a topic type.
  List all global event subscriptions under a resource group for a specific topic type.
  
  @param resourceGroupName The name of the resource group within the user's subscription.
  @param topicTypeName Name of the topic type
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object