src/vs/editor/contrib/suggest/suggestWidget.ts/SuggestContentWidget/beforeRender
class SuggestContentWidget:	beforeRender() {
		const { height, width } = this._widget.element.size;
		const { borderWidth, horizontalPadding } = this._widget.getLayoutInfo();
		return new dom.Dimension(width + 2 * borderWidth + horizontalPadding, height + 2 * borderWidth);
	}