function __construct($field = null) { parent::__construct($field, array('name', 'id', 'venue')); }
function __construct($field = null) { parent::__construct($field, array('name', 'id', 'start', 'duration', 'space')); }
public function __construct($field = null) { parent::__construct($field, array('id', 'sitting_time', 'name')); }