php - Expected path to Sluggable builder in Symfony/Doctrine -

the default string normalization (provided doctrine_inflector::urlize() "sluggifier") isn't suitable project, need utilize own algorithm.

i set schema follows:

myobject:   actas:     sluggable:       fields: [name]       builder: array('textutility', 'normalize')   columns:     name: string(255) 

and added utility class lib folder of project (although tried lib folder of app) according instructions found in forum:

<?php //lib/textutility.class.php  class textutility {     public static function normalize($str) {         /* ... */          return $str;     } } ?> 

when run symfony doctrine:build --all i'm greeted following error:

warning: call_user_func_array() expects parameter 1 valid callback, function 'array('textutility', 'normalize')' not found or invalid function name in /symfony/lib/plugins/sfdoctrineplugin/lib/vendor/doctrine/doctrine/template/listener/sluggable.php on line 171 

i assume i'm putting utility in wrong place , it's not being loaded when needed. putting in wrong place? doctrine's documentation doesn't seem mention subject, unless i'm looking @ wrong page.

arrays in yaml defined other way:

myobject:   actas:     sluggable:       builder: [textutility, normalize]