src/vs/editor/contrib/gotoSymbol/peek/referencesWidget.ts/ReferenceWidget/dispose
class ReferenceWidget:	override dispose(): void {
		this.setModel(undefined);
		this._callOnDispose.dispose();
		this._disposeOnNewModel.dispose();
		dispose(this._preview);
		dispose(this._previewNotAvailableMessage);
		dispose(this._tree);
		dispose(this._previewModelReference);
		this._splitView.dispose();
		super.dispose();
	}