Method has_circle

libs/indexer/drules_struct.pb.cc:5317–5319

.CircleRuleProto circle = 6;

// .CircleRuleProto circle = 6;
bool DrawElementProto::has_circle() const {
  return this != internal_default_instance() && circle_ != NULL;
}
void DrawElementProto::clear_circle() {
  if (GetArenaNoVirtual() == NULL && circle_ != NULL) delete circle_;
  circle_ = NULL;