src/vs/platform/actions/browser/dropdownWithPrimaryActionViewItem.ts/DropdownWithPrimaryActionViewItem/focus
class DropdownWithPrimaryActionViewItem:	override focus(fromRight?: boolean): void {
		if (fromRight) {
			this._dropdown.focus();
		} else {
			this._primaryAction.element!.tabIndex = 0;
			this._primaryAction.element!.focus();
		}
	}