$fieldsToReturn = array('start_date', 'event_type_id', 'title', 'summary');
$request['params']['return'] = array_unique(array_merge($fieldsToReturn, $request['extra']));
$request['params']['options']['sort'] = 'start_date DESC';
$fieldsToReturn = array('start_date', 'event_type_id', 'title', 'summary');
$request['params']['return'] = array_unique(array_merge($fieldsToReturn, $request['extra']));
$request['params']['options']['sort'] = 'start_date DESC';