public int getUserIdsForCommonGroupsCount() {
        return userIdsForCommonGroups_.size();
    }
<code>repeated int64 user_ids_for_common_groups = 2;</code>

@return The count of userIdsForCommonGroups.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/request/group/QueryJoinedGroupInfosRequest.java