The idea is that you have attributes that don't affect itemization,
such as font features, so you filter them out using
[method@Pango.AttrList.filter], itemize your text, then reapply the
attributes to the resulting items using this function.
The @iter should be positioned before the range of the item,
and will be advanced past it. This function is meant to be called
in a loop over the items resulting from itemization, while passing
the iter to each call.
Add attributes to a PangoItem.
The idea is that you have attributes that don't affect itemization, such as font features, so you filter them out using [method@Pango.AttrList.filter], itemize your text, then reapply the attributes to the resulting items using this function.
The @iter should be positioned before the range of the item, and will be advanced past it. This function is meant to be called in a loop over the items resulting from itemization, while passing the iter to each call.