private void ensureGroupJoinQuestionsIsMutable() {
        com.google.protobuf.Internal.ProtobufList<im.turms.client.model.proto.model.group.GroupJoinQuestion> tmp =
                groupJoinQuestions_;
        if (!tmp.isModifiable()) {
            groupJoinQuestions_ = com.google.protobuf.GeneratedMessageLite.mutableCopy(tmp);
        }
    }
<code>repeated .im.turms.proto.GroupJoinQuestion group_join_questions = 1;</code>
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/group/GroupJoinQuestionsWithVersion.java