if (null != string) {
            return ImmutableList.copyOf(Splitter.on(",").split(string));
        }
        return Collections.emptyList();
    }

    public static <T extends PerformanceTestResult> WritableResultsStore<T> createResultsStoreWhenDatabaseAvailable(Supplier<WritableResultsStore<T>> supplier) {
        return PerformanceDatabase.isAvailable()
            ? supplier.get()