code: @Override
      public java.util.concurrent.Future<GetSubscriptionAttributesResult> getSubscriptionAttributesAsync(String subscriptionArn) {
  
          return getSubscriptionAttributesAsync(new GetSubscriptionAttributesRequest().withSubscriptionArn(subscriptionArn));
      }
docs: Simplified method form for invoking the GetSubscriptionAttributes operation.
  
  @see #getSubscriptionAttributesAsync(GetSubscriptionAttributesRequest)