Event handler support for drag and drop?

I've been playing around with Sandcastle and extending the viewer with viewerDragDropMixin. Is there an event that fires when the loading of the czml/json object is complete? I'd like to do some additional processing to the object once it has been loaded.

Thanks

You can subscribe to the viewer.dataSources.dataSourceAdded event (and there’s also a corresponding remove event). viewer.dataSources is an instance of DataSourceCollection: http://cesiumjs.org/Cesium/Build/Documentation/DataSourceCollection.html