I am writing a custom trace tool widget, and will need to highlight features on a web map returned from the REST API. I have a function called getFeatureLayers, and I'm calling it from the widget startup function, passing in a layerStructure that I get from the LayerStructure.getInstance(). To test highlighting, I am trying to highlight all features on the map first. I thought I needed to use the selectFeatures method on FeatureLayer, but nothing gets highlighted on the map. No errors or warnings are thrown, but nothing happens. The traversal seems to work, as I get back 14 feature layers. My code is below. What am I missing?