pub unsafe extern "C" fn gdk_pixbuf_save_to_callbackv(
pixbuf: *mut GdkPixbuf,
save_func: GdkPixbufSaveFunc,
user_data: gpointer,
type_: *const c_char,
option_keys: *mut *mut c_char,
option_values: *mut *mut c_char,
error: *mut *mut GError,
) -> gboolean