Given a PangoAttrList and callback function, removes any elements of list for which func returns TRUE and inserts them into a new list.
callback function; returns TRUE if an attribute should be filtered out.
Data to be passed to func
the new PangoAttrList or NULL if no attributes of the given types were found.
1.2
Given a PangoAttrList and callback function, removes any elements of list for which func returns TRUE and inserts them into a new list.