template <typename T>
void ReplaceAttr(Node* n, const string& attr_name, const T& value) {
  n->ClearAttr(attr_name);
  n->AddAttr(attr_name, value);
}

// Step 1 for `PreprocessEdgesBetweenOutsideCompilations`. See comments of
// `PreprocessEdgesBetweenOutsideCompilations` for details.
Status PreprocessControlEdgesBetweenOutsideCompilations(
    Graph* g, const string& outside_compilation_attr_name) {