private void removeUserRelationshipGroups(int index) {
        ensureUserRelationshipGroupsIsMutable();
        userRelationshipGroups_.remove(index);
    }
<code>repeated .im.turms.proto.UserRelationshipGroup user_relationship_groups = 1;</code>
turms-client-kotlin/src/main/java/im/turms/client/model/proto/model/user/UserRelationshipGroupsWithVersion.java