docs: public ServiceFuture<SharedAccessAuthorizationRuleResourceInner> getAuthorizationRuleAsync(String resourceGroupName, String namespaceName, String authorizationRuleName, final ServiceCallback<SharedAccessAuthorizationRuleResourceInner> serviceCallback) {
          return ServiceFuture.fromResponse(getAuthorizationRuleWithServiceResponseAsync(resourceGroupName, namespaceName, authorizationRuleName), serviceCallback);
      }