Function gtk_sys::gtk_icon_theme_load_icon

pub unsafe extern "C" fn gtk_icon_theme_load_icon(
    icon_theme: *mut GtkIconTheme, 
    icon_name: *const c_char, 
    size: c_int, 
    flags: GtkIconLookupFlags, 
    error: *mut *mut GError
) -> *mut GdkPixbuf