code: func (state *DockerTaskEngineState) ContainerByID(id string) (*apicontainer.DockerContainer, bool) {
  	state.lock.RLock()
  	defer state.lock.RUnlock()
  
  	c, ok := state.idToContainer[id]
  	return c, ok
  }
docs: // ContainerByID returns an apicontainer.DockerContainer for a given container ID