/// Each attempt may be multiple HTLCs along multiple paths if the router decides to split up a
/// retry, and may retry multiple failed HTLCs at once if they failed around the same time and
/// were retried along a route from a single call to [`Router::find_route_with_id`].
/// Each attempt may be multiple HTLCs along multiple paths if the router decides to split up a
/// retry, and may retry multiple failed HTLCs at once if they failed around the same time and
/// were retried along a route from a single call to [`Router::find_route_with_id`].