message: Fix search for root tile contents.
diff: @@ -117,6 +117,8 @@ class RealityModelTileLoader extends TileLoader {
  }
  private findTileInJson(tilesetJson: any, id: string, parentId: string): FindChildResult | undefined {
  + if (id.length === 0)
  + return new FindChildResult(id, tilesetJson); // Root.
  const separatorIndex = id.indexOf("_");
  const childId = (separatorIndex < 0) ? id : id.substring(0, separatorIndex);
  const childIndex = parseInt(childId, 10);
  