code: public Observable<ApplicationInner> getAsync(String resourceGroupName, String clusterName, String applicationName) {
          return getWithServiceResponseAsync(resourceGroupName, clusterName, applicationName).map(new Func1<ServiceResponse<ApplicationInner>, ApplicationInner>() {
              @Override
              public ApplicationInner call(ServiceResponse<ApplicationInner> response) {
                  return response.body();
              }
          });
      }
docs: Gets properties of the specified application.
  
  @param resourceGroupName The name of the resource group.
  @param clusterName The name of the cluster.
  @param applicationName The constant value for the application name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ApplicationInner object