Gtk::TreeModel::Children children(iter->children());
for(iter = children.begin(); iter && iter != children.end(); ++iter)
{
if((Glib::ustring)(*iter)[model.param_name]==param_name)
{
Gtk::TreeModel::Children children(iter->children());
for(iter = children.begin(); iter && iter != children.end(); ++iter)
{
if((Glib::ustring)(*iter)[model.param_name]==param_name)
{