Function gtk4_sys::gtk_icon_theme_lookup_by_gicon

pub unsafe extern "C" fn gtk_icon_theme_lookup_by_gicon(
    self_: *mut GtkIconTheme,
    icon: *mut GIcon,
    size: c_int,
    scale: c_int,
    direction: GtkTextDirection,
    flags: GtkIconLookupFlags
) -> *mut GtkIconPaintable