I've tried a few different things. queryFeatures and applyEdits({removeFeatures: results.features}) and then in the 'then' adding the new features (hopefully removing all the old features and adding the new), but that doesn't work. If I use updateFeatures then the duplicate/blank features are gone. I was hoping that the objectId would mean that the features would be unique values and that any updates would update that objectId (like a hashmap), but that doesn't seem to be the case. Or, if it is, then something even stranger is going on.
```
replaceFeatureLayerFeatures(title: string, features: Collection<Graphic>, renderer: Renderer) {
const selectedFeatureLayer = (this.map.layers.find(layer => layer.id === this.layerService.featuresGroupLayer.id) as GroupLayer).findLayerById(title) as FeatureLayer;
if (selectedFeatureLayer) {
let query = new Query();
selectedFeatureLayer.queryFeatures(query).then(results => {
console.log('results', results);
selectedFeatureLayer.applyEdits({ addFeatures: features });
});
} else {
console.log(`creating a ${title} layer`);
this.createFeatureLayer(title, features, renderer);
}
}
