code: func (c *RefManager) GetRef(id ContainerID) (ref *v1.ObjectReference, ok bool) {
  	c.RLock()
  	defer c.RUnlock()
  	ref, ok = c.containerIDToRef[id]
  	return ref, ok
  }
docs: // GetRef returns the container reference of the given ID, or (nil, false) if none is stored.