code: public List<EventSubscriptionInner> listGlobalByResourceGroupForTopicType(String resourceGroupName, String topicTypeName) {
          return listGlobalByResourceGroupForTopicTypeWithServiceResponseAsync(resourceGroupName, topicTypeName).toBlocking().single().body();
      }
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
  @throws IllegalArgumentException thrown if parameters fail the validation
  @throws CloudException thrown if the request is rejected by server
  @throws RuntimeException all other wrapped checked exceptions if the request fails to be sent
  @return the List&lt;EventSubscriptionInner&gt; object if successful.