src/vs/workbench/contrib/notebook/browser/diff/notebookDiffList.ts/NotebookTextDiffList/getAbsoluteTopOfElement
class NotebookTextDiffList:	getAbsoluteTopOfElement(element: DiffElementViewModelBase): number {
		const index = this.indexOf(element);
		// if (index === undefined || index < 0 || index >= this.length) {
		// 	this._getViewIndexUpperBound(element);
		// 	throw new ListError(this.listUser, `Invalid index ${index}`);
		// }

		return this.view.elementTop(index);
	}