Function gstreamer::iterator::fold_trampoline

source ยท 
unsafe extern "C" fn fold_trampoline<T, U, F: FnMut(U, T) -> Result<U, U>>(
    value: *const GValue,
    ret: *mut GValue,
    func: gpointer,
) -> gboolean
where
    for<'a> T: FromValue<'a> + 'static,