Combo with enableFilteringMode configured in form xml

Hello,
My form’s structure is initialized with XML returned from server.
How can combo’s Filtering Mode be enabled in that XML?
I know that I can call

form.getCombo("myCombo").enableFilteringMode(true)

But I don’t know “myCombo” and other id’s in advance, because my form is dynamic.

hi

{type: “combo”, filtering: true }
docs.dhtmlx.com/doku.php?id=dhtmlxform:dhxcombo