PlanetManager planet = roller.getPlanetManager();
PlanetGroupForm form = (PlanetGroupForm)actionForm;
if (form.getHandle() != null)
{
PlanetGroupData group = planet.getGroup(form.getHandle());
planet.deleteGroup(group);
roller.flush();
// TODO: why release here?
roller.release();
form.doReset(mapping, request);