Method has_caption

libs/indexer/drules_struct.pb.cc:5278–5280

.CaptionRuleProto caption = 5;

// .CaptionRuleProto caption = 5;
bool DrawElementProto::has_caption() const {
  return this != internal_default_instance() && caption_ != NULL;
}
void DrawElementProto::clear_caption() {
  if (GetArenaNoVirtual() == NULL && caption_ != NULL) delete caption_;
  caption_ = NULL;