src/vs/workbench/contrib/notebook/browser/diff/notebookDiffList.ts/CellDiffSideBySideRenderer/renderElement
class CellDiffSideBySideRenderer:	renderElement(element: SideBySideDiffElementViewModel, index: number, templateData: CellDiffSideBySideRenderTemplate, height: number | undefined): void {
		templateData.body.classList.remove('left', 'right', 'full');

		switch (element.type) {
			case 'unchanged':
				templateData.elementDisposables.add(this.instantiationService.createInstance(ModifiedElement, this.notebookEditor, element, templateData));
				return;
			case 'modified':
				templateData.elementDisposables.add(this.instantiationService.createInstance(ModifiedElement, this.notebookEditor, element, templateData));
				return;
			default:
				break;
		}
	}