public static StreamCache <Empty, T> Sort <T, U>(this IStreamable <Empty, T> stream, Expression <Func <T, U> > sortBySelector)
{
var u_comparer = Utility.CreateCompoundComparer(sortBySelector, ComparerExpression <U> .Default.GetCompareExpr()).Compile();
IStreamable <Empty, T> stream2 = stream;
stream.GetProperties(out StreamProperties <Empty, T> properties);
if (!properties.IsStartEdgeOnly)
{
var secondStream = new StreamEvent <T>[]
{
StreamEvent.CreateStart(StreamEvent.MaxSyncTime, default(T)),
StreamEvent.CreatePunctuation <T>(StreamEvent.InfinitySyncTime),
}.ToObservable().ToStreamable();
stream2 = stream.Join(secondStream, (x, y) => x);
}
var observableCache = stream2.ToPayloadEnumerable().ToList();
observableCache.Sort(new Comparison <T>(u_comparer));
var str = observableCache.ToObservable()
.ToAtemporalStreamable(TimelinePolicy.Sequence(80000))
;
var str2 = str
.SetProperty().IsConstantDuration(true, StreamEvent.InfinitySyncTime)
;
var str3 = str2.Cache();
return(str3);
}