I think FormWidgetText->isComb() should be mapped to PopplerTextField.comb.
But _form_field_new_from_widget() doesn't map that.
Created attachment 10407 [details] [review]
maps FormWidgetText->isComb() to PopplerTextForm.comb.
This bug is not valid for current code. Closing as INVALID.
Thank you very much for the patch.