code: func isMemoryBestEffort(container *api.Container) bool {
  	// A container is memory best-effort if its memory request is unspecified or 0.
  	// If a request is specified, then the user expects some kind of resource guarantee.
  	return container.Resources.Requests.Memory().Value() == 0
  }
docs: // isMemoryBestEffort returns true if the container's memory requirements are best-effort.