src/vs/workbench/contrib/notebook/browser/diff/diffElementViewModel.ts/SideBySideDiffElementViewModel/getCellByUri
class SideBySideDiffElementViewModel:	getCellByUri(cellUri: URI): IGenericCellViewModel {
		if (cellUri.toString() === this.original.uri.toString()) {
			return this.original;
		} else {
			return this.modified;
		}
	}