/** * Returns an array containing, for each field, the arary key used for that * field in self::$_fields. * * @return array */ static function &fieldKeys() { if (!self::$_fieldKeys) { self::$_fieldKeys = array('id' => 'id', 'contact_type' => 'contact_type', 'threshold' => 'threshold', 'used' => 'used', 'name' => 'name', 'title' => 'title', 'is_reserved' => 'is_reserved'); } return self::$_fieldKeys; }