private String selectedItemsAsString(AbstractGrid grid) {
StringBuilder res = new StringBuilder();
Collection<IModel> selected = grid.getSelectedItems();
for (IModel model : selected) {
Contact contact = (Contact) model.getObject();
if (res.length() > 0) {
res.append(", ");
}
res.append(contact.getFirstName());
res.append(" ");
res.append(contact.getLastName());
}
return res.toString();
}