public static async Task syncDirectory(PathChange change)
{
if (change.Mode != ChangeMode.Deep)
return;
var rfs = change.ReadFileSystem;
var sourceEntries = rfs.scan(change.Source);
var targetEntries = rfs.scan(change.Target);
var all = sourceEntries.Concat(targetEntries).Distinct();
await Task.WhenAll(all.Select(str => Synchronizer.sync(change.nested(str))));
}
