src/vs/editor/browser/view/viewOverlays.ts/ViewOverlays/constructor
class ViewOverlays:	constructor(context: ViewContext) {
		super(context);

		this._visibleLines = new VisibleLinesCollection<ViewOverlayLine>(this);
		this.domNode = this._visibleLines.domNode;

		this._dynamicOverlays = [];
		this._isFocused = false;

		this.domNode.setClassName('view-overlays');
	}