code: public Observable<SummarizeResultsInner> summarizeForSubscriptionLevelPolicyAssignmentAsync(String subscriptionId, String policyAssignmentName) {
          return summarizeForSubscriptionLevelPolicyAssignmentWithServiceResponseAsync(subscriptionId, policyAssignmentName).map(new Func1<ServiceResponse<SummarizeResultsInner>, SummarizeResultsInner>() {
              @Override
              public SummarizeResultsInner call(ServiceResponse<SummarizeResultsInner> response) {
                  return response.body();
              }
          });
      }
docs: Summarizes policy states for the subscription level policy assignment.
  
  @param subscriptionId Microsoft Azure subscription ID.
  @param policyAssignmentName Policy assignment name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the SummarizeResultsInner object