private com.google.protobuf.SingleFieldBuilder<im.turms.server.common.access.client.dto.model.group.GroupMembersWithVersion, im.turms.server.common.access.client.dto.model.group.GroupMembersWithVersion.Builder, im.turms.server.common.access.client.dto.model.group.GroupMembersWithVersionOrBuilder> getGroupMembersWithVersionFieldBuilder() {
                if (groupMembersWithVersionBuilder_ == null) {
                    if (!(kindCase_ == 19)) {
                        kind_ = im.turms.server.common.access.client.dto.model.group.GroupMembersWithVersion
                                .getDefaultInstance();
                    }
                    groupMembersWithVersionBuilder_ = new com.google.protobuf.SingleFieldBuilder<>(
                            (im.turms.server.common.access.client.dto.model.group.GroupMembersWithVersion) kind_,
                            getParentForChildren(),
                            isClean());
                    kind_ = null;
                }
                kindCase_ = 19;
                onChanged();
                return groupMembersWithVersionBuilder_;
            }
<code>.im.turms.proto.GroupMembersWithVersion group_members_with_version = 19;</code>
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/notification/TurmsNotification.java