src/vs/workbench/api/browser/viewsExtensionPoint.ts/ViewsExtensionHandler/handleAndRegisterCustomViews
class ViewsExtensionHandler:	private handleAndRegisterCustomViews() {
		viewsExtensionPoint.setHandler((extensions, { added, removed }) => {
			if (removed.length) {
				this.removeViews(removed);
			}
			if (added.length) {
				this.addViews(added);
			}
		});
	}