public virtual void list_sizes (out int? sizes)
List the available sizes for a font.
This is only applicable to bitmap fonts. For scalable fonts, stores null at the location pointed to by
sizes and 0 at the location pointed to by
sizes.length. The sizes returned are in Pango units and are sorted in ascending
location to store a pointer to an array of int. This array should be freed with g_free.
location to store the number of elements in