src/vs/workbench/contrib/notebook/browser/view/cellParts/cellActionView.ts/ActionViewWithLabel/updateLabel
class ActionViewWithLabel:	protected override updateLabel() {
		if (this._actionLabel) {
			this._actionLabel.classList.add('notebook-label');
			this._actionLabel.innerText = this._action.label;
			this._actionLabel.title = this._action.tooltip.length ? this._action.tooltip : this._action.label;
		}
	}