src/vs/workbench/browser/parts/compositeBarActions.ts/CompositeActionViewItem/updateChecked
class CompositeActionViewItem:	protected override updateChecked(): void {
		if (this.getAction().checked) {
			this.container.classList.add('checked');
			this.container.setAttribute('aria-label', this.container.title);
			this.container.setAttribute('aria-expanded', 'true');
			this.container.setAttribute('aria-selected', 'true');
		} else {
			this.container.classList.remove('checked');
			this.container.setAttribute('aria-label', this.container.title);
			this.container.setAttribute('aria-expanded', 'false');
			this.container.setAttribute('aria-selected', 'false');
		}
		this.updateStyles();
	}