src/vs/workbench/contrib/markers/browser/markersTreeViewer.ts/ToggleMultilineActionViewItem/updateExpandedAttribute
class ToggleMultilineActionViewItem:	private updateExpandedAttribute(): void {
		if (this.element) {
			this.element.setAttribute('aria-expanded', `${this._action.class === ThemeIcon.asClassName(expandedIcon)}`);
		}
	}