for (const Edge* e : from->in_edges()) {
    if (e->IsControlEdge()) {
      g->AddControlEdge(e->src(), to);
    }
  }

  return absl::OkStatus();
}

void RemoveAllIncomingControlEdges(Graph* g, Node* n) {
  std::vector<const Edge*> incoming_ctrl_edges;
  absl::c_copy_if(n->in_edges(), std::back_inserter(incoming_ctrl_edges),
                  [](const Edge* e) { return e->IsControlEdge(); });