code: public ServiceFuture<DebugSendResponseInner> debugSendAsync(String resourceGroupName, String namespaceName, String notificationHubName, final ServiceCallback<DebugSendResponseInner> serviceCallback) {
          return ServiceFuture.fromResponse(debugSendWithServiceResponseAsync(resourceGroupName, namespaceName, notificationHubName), serviceCallback);
      }
docs: test send a push notification.
  
  @param resourceGroupName The name of the resource group.
  @param namespaceName The namespace name.
  @param notificationHubName The notification hub name.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object