private static List<String> getDefaultIndices() {
        // for metrics we create only one index which matches the index prefix
        // So we use an empty string as postfix for index creation
        String[] indices = {""};
        return Arrays.asList(indices);
    }
Get default indices for metrics
@return default indeces for metrics
manager/test/api/src/test/java/io/apiman/manager/test/es/EsMetricsAccessorTest.java