code: @Override
    public void onContainerStarted(final ContainerId containerId, final Map<String, ByteBuffer> stringByteBufferMap) {
      final Optional<Container> container = this.containers.getOptional(containerId.toString());
      if (container.isPresent()) {
        this.nodeManager.getContainerStatusAsync(containerId, container.get().getNodeId());
      }
    }
docs: NM Callback: NM accepts the starting container request.
  @param containerId ID of a new container being started.
  @param stringByteBufferMap a Map between the auxiliary service names and their outputs. Not used.