code: public ServiceFuture<SignalRKeysInner> regenerateKeyAsync(String resourceGroupName, String resourceName, final ServiceCallback<SignalRKeysInner> serviceCallback) {
          return ServiceFuture.fromResponse(regenerateKeyWithServiceResponseAsync(resourceGroupName, resourceName), serviceCallback);
      }
docs: Regenerate SignalR service access key. PrimaryKey and SecondaryKey cannot be regenerated at the same time.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param resourceName The name of the SignalR resource.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object