in packages/forge-viewhubs-netcore-aws/wwwroot/js/ForgeViewer.js [19:25]
function onDocumentLoadSuccess(doc) {
// if a viewableId was specified, load that view, otherwise the default view
var viewables = (viewableId ? doc.getRoot().findByGuid(viewableId) : doc.getRoot().getDefaultGeometry());
viewer.loadDocumentNode(doc, viewables).then(i => {
// any additional action here?
});
}