[TYPO3] itemsProcFunc in flexform

[Stano Paška]

Hi,

I need use itemsProcFunc in my flexform.
But in BE I got error: Function/Class
'class.tx_zclient->user_getFirmsCategories' was not prepended with
'user_'

I know about this, but WHY in tt_news it works WITHOUT user_???
in flexforms_ds.xml
<itemsProcFunc>tx_ttnews_itemsProcFunc->user_insertExtraCodes</itemsProcFunc>
in ext_tables.php
include_once(t3lib_extMgm::extPath($_EXTKEY).'class.tx_ttnews_itemsProcFunc.php');

I copied it from tt_news and for me it does not work:
in flexforms_ds.xml
<itemsProcFunc>class.tx_zclient->user_getFirmsCategories</itemsProcFunc>
in ext_tables.php
include_once(t3lib_extMgm::extPath($_EXTKEY).'class.tx_zclient.php');

I will rewrite it into separate user_ class, but why it works in tt_news?

Stano Paška.