src/vs/workbench/contrib/debug/browser/callStackView.ts/CallStackDelegate/getHeight
class CallStackDelegate:	getHeight(element: CallStackItem): number {
		if (element instanceof StackFrame && element.presentationHint === 'label') {
			return 16;
		}
		if (element instanceof ThreadAndSessionIds || element instanceof Array) {
			return 16;
		}

		return 22;
	}