static function getRelationMassiveActionsSpecificities()
{
global $CFG_GLPI;
$specificities = parent::getRelationMassiveActionsSpecificities();
$specificities['select_items_options_1'] = array('right' => 'all');
$specificities['select_items_options_2'] = array('condition' => '`is_usergroup`');
// Define normalized action for add_item and remove_item
$specificities['normalized']['add'][] = 'add_supervisor';
$specificities['normalized']['add'][] = 'add_delegatee';
$specificities['button_labels']['add_supervisor'] = $specificities['button_labels']['add'];
$specificities['button_labels']['add_delegatee'] = $specificities['button_labels']['add'];
$specificities['update_if_different'] = true;
return $specificities;
}