// popList takes all Gs in q and returns them as a gList.
func (q *gQueue) popList() gList {
	stack := gList{q.head}
	*q = gQueue{}
	return stack
}

// A gList is a list of Gs linked through g.schedlink. A G can only be
// on one gQueue or gList at a time.
type gList struct {
	head guintptr
}

// empty reports whether l is empty.
func (l *gList) empty() bool {
	return l.head == 0
}

        break;
      case tensorflow::AttrValue::kList:
        if (attr.list().s_size() > 0) {
          auto start = flex_builder->StartVector(key);
          for (const std::string& v : attr.list().s()) {
            flex_builder->Add(v);
          }
          flex_builder->EndVector(start, /*typed=*/true, /*fixed=*/false);
        } else if (attr.list().i_size() > 0) {