Get the font and other attributes at the current iterator position.
a `PangoFontDescription` to fill in with the current values. The family name in this structure will be set using [ method@Pango.FontDescription.set_family_static] using values from an attribute in the `PangoAttrList` associated with the iterator, so if you plan to keep it around, you must call: `pango_font_description_set_family (desc, pango_font_description_get_family (desc))`.
location to store language tag for item, or null if none is found.
location in which to store a list of non-font attributes at the the current position; only the highest priority value of each attribute will be added to this list. In order to free this value, you must call [method@Pango.Attribute.destroy] on each member.