public long getUserIdsForCommonGroups(int index) {
        return userIdsForCommonGroups_.getLong(index);
    }
<code>repeated int64 user_ids_for_common_groups = 2;</code>

@param index The index of the element to return.
@return The userIdsForCommonGroups at the given index.
turms-server-common/src/main/java/im/turms/server/common/access/client/dto/request/group/QueryJoinedGroupIdsRequest.java