src/vs/editor/contrib/codelens/browser/codelensWidget.ts/CodeLensWidget/_createContentWidgetIfNecessary
class CodeLensWidget:	private _createContentWidgetIfNecessary(): void {
		if (!this._contentWidget) {
			this._contentWidget = new CodeLensContentWidget(this._editor, this._viewZone.afterLineNumber + 1);
			this._editor.addContentWidget(this._contentWidget);
		} else {
			this._editor.layoutContentWidget(this._contentWidget);
		}
	}