docs: public ServiceFuture<SummarizeResultsInner> summarizeForResourceGroupLevelPolicyAssignmentAsync(String subscriptionId, String resourceGroupName, String policyAssignmentName, final ServiceCallback<SummarizeResultsInner> serviceCallback) {
          return ServiceFuture.fromResponse(summarizeForResourceGroupLevelPolicyAssignmentWithServiceResponseAsync(subscriptionId, resourceGroupName, policyAssignmentName), serviceCallback);
      }