code: func (t *ActivatedTask) WalkGraph(req *dm.WalkGraphReq) (*dm.GraphData, error) {
  	newReq := *req
  	newReq.Auth = t.Auth
  	return t.s.WalkGraph(t.c, &newReq)
  }
docs: // WalkGraph calls the bound DepsServer's WalkGraph method with the activated
  // Auth field.