Method has_shield

libs/indexer/drules_struct.pb.cc:5395–5397

.ShieldRuleProto shield = 8;

// .ShieldRuleProto shield = 8;
bool DrawElementProto::has_shield() const {
  return this != internal_default_instance() && shield_ != NULL;
}
void DrawElementProto::clear_shield() {
  if (GetArenaNoVirtual() == NULL && shield_ != NULL) delete shield_;
  shield_ = NULL;