src/vs/workbench/contrib/notebook/browser/view/cellParts/cellComments.ts/CellComments/_calculateCommentThreadHeight
class CellComments:	private _calculateCommentThreadHeight(bodyHeight: number) {
		const layoutInfo = this.notebookEditor.getLayoutInfo();

		const headHeight = Math.ceil(layoutInfo.fontInfo.lineHeight * 1.2);
		const lineHeight = layoutInfo.fontInfo.lineHeight;
		const arrowHeight = Math.round(lineHeight / 3);
		const frameThickness = Math.round(lineHeight / 9) * 2;

		const computedHeight = headHeight + bodyHeight + arrowHeight + frameThickness + 8 /** margin bottom to avoid margin collapse */;
		return computedHeight;

	}