src/vs/editor/browser/viewParts/overlayWidgets/overlayWidgets.ts/ViewOverlayWidgets/constructor
class ViewOverlayWidgets:	constructor(context: ViewContext) {
		super(context);

		const options = this._context.configuration.options;
		const layoutInfo = options.get(EditorOption.layoutInfo);

		this._widgets = {};
		this._verticalScrollbarWidth = layoutInfo.verticalScrollbarWidth;
		this._minimapWidth = layoutInfo.minimap.minimapWidth;
		this._horizontalScrollbarHeight = layoutInfo.horizontalScrollbarHeight;
		this._editorHeight = layoutInfo.height;
		this._editorWidth = layoutInfo.width;

		this._domNode = createFastDomNode(document.createElement('div'));
		PartFingerprints.write(this._domNode, PartFingerprint.OverlayWidgets);
		this._domNode.setClassName('overlayWidgets');
	}