Method MutableRepeatedMessage

depends/protobuf/google/protobuf/extension_set.cc:463–468

}

MessageLite* ExtensionSet::MutableRepeatedMessage(int number, int index) {
  map<int, Extension>::iterator iter = extensions_.find(number);
  GOOGLE_CHECK(iter != extensions_.end()) << "Index out-of-bounds (field is empty).";
  GOOGLE_DCHECK_TYPE(iter->second, REPEATED, MESSAGE);
  return iter->second.repeated_message_value->Mutable(index);
}

MessageLite* ExtensionSet::AddMessage(int number, FieldType type,
                                      const MessageLite& prototype,