src/vs/workbench/contrib/notebook/browser/view/renderers/cellRenderer.ts/AbstractCellRenderer/commonRenderTemplate
class AbstractCellRenderer:	protected commonRenderTemplate(templateData: BaseCellRenderTemplate): void {
		templateData.disposables.add(DOM.addDisposableListener(templateData.container, DOM.EventType.FOCUS, () => {
			if (templateData.currentRenderedCell) {
				this.notebookEditor.focusElement(templateData.currentRenderedCell);
			}
		}, true));

		this.addExpandListener(templateData);
	}