sub _GROUPS {
    my ( $this, $params ) = @_;

    my @groupNames = map {
      '| [['.$_->webDotWikiName().  ']['.$_->wikiName().']] |'.
        join(', ', map {
            '[['.$_->webDotWikiName().']['.$_->wikiName().']]'
        } @{$_->groupMembers()}). ' |';
    } sort {$a->wikiName() cmp $b->wikiName()} @{$this->{users}->getAllGroups()};

    return '| *Group* | *Members* |'."\n".join("\n", @groupNames);
}