src/vs/base/browser/ui/actionbar/actionViewItems.ts/BaseActionViewItem/handleActionChangeEvent
class BaseActionViewItem:	private handleActionChangeEvent(event: IActionChangeEvent): void {
		if (event.enabled !== undefined) {
			this.updateEnabled();
		}

		if (event.checked !== undefined) {
			this.updateChecked();
		}

		if (event.class !== undefined) {
			this.updateClass();
		}

		if (event.label !== undefined) {
			this.updateLabel();
			this.updateTooltip();
		}

		if (event.tooltip !== undefined) {
			this.updateTooltip();
		}
	}