Function returnKey

docs/app/js/sanddance-app.js:41696–41699

(acc, current)

    CommandBarBase1.prototype._computeCacheKey = function(data) {
        var primaryItems = data.primaryItems, overflow = data.overflow;
        var returnKey = function(acc, current) {
            var _a = current.cacheKey, cacheKey = _a === void 0 ? current.key : _a;
            return acc + cacheKey;
        };
        var primaryKey = primaryItems && primaryItems.reduce(returnKey, "");
        var overflowKey = overflow ? "overflow" : "";
        return [