message: WIP: Default expiration time on TileTree should not be 5000 seconds.
diff: @@ -507,7 +507,7 @@ export class TileTree implements IDisposable {
  this.is3d = props.is3d;
  this.id = props.id;
  this.location = props.location;
  - this.expirationTime = BeDuration.fromSeconds(5000); // ###TODO tile purging strategy
  + this.expirationTime = BeDuration.fromSeconds(5); // ###TODO tile purging strategy
  this.clipVector = props.clipVector;
  this.maxTilesToSkip = JsonUtils.asInt(props.maxTilesToSkip, 100);
  this.loader = props.loader;
  