String createId(final long value) {
        final String longString = Long.toString(value);
        switch (longString.length()) {
            case 1:
                return prefix9 + longString;
            case 2:
                return prefix8 + longString;
            case 3:
                return prefix7 + longString;
            case 4:
                return prefix6 + longString;
            case 5:
                return prefix5 + longString;
            case 6:
                return prefix4 + longString;
            case 7:
                return prefix3 + longString;
            case 8:
                return prefix2 + longString;
            case 9:
                return prefix1 + longString;
            default:
                return prefix0 + longString;
        }
    }
Create an ID from this instance's prefix and zero padded specified value.

Hand rolled equivalent to `String.format("ex-%010d", value)` optimized to reduce
allocation and CPU overhead.
httpclient5/src/main/java/org/apache/hc/client5/http/impl/PrefixedIncrementingId.java