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