Unreal Engine Async TraceDelegate lambda usage.

UsingAsyncTraceDelegates.cpp

// @MarkJGx this is how you use async trace delegates.

FTraceDelegate TraceDelegate = FTraceDelegate::CreateWeakLambda(
  this, [](const FTraceHandle& TraceHandle, FTraceDatum& TraceResults)
  {
    if(TraceResults.OutHits.Num() > 0)
    {
      const FHitResult& Result = TraceResults.OutHits[0];
    }
  });

GetWorld()->AsyncLineTraceByChannel(EAsyncTraceType::Single, Start, End, ECC_Hitscan, CollisionParams,
                                    FCollisionResponseParams::DefaultResponseParam, &TraceDelegate);