src/vs/workbench/contrib/scm/browser/scmViewPane.ts/ViewModel/sortKey
class ViewModel:	set sortKey(sortKey: ViewModelSortKey) {
		if (this._sortKey === sortKey) {
			return;
		}

		this._sortKey = sortKey;

		this.refresh();
		this._onDidChangeSortKey.fire(sortKey);
		this.sortKeyContextKey.set(sortKey);
	}