public static ULong min(ULong a, ULong b) {
        return a.compareTo(b) < 0 ? a : b;
    }
Returns the smaller of two {@code ULong} values.

@param a an argument.
@param b another argument.
@return the smaller of {@code a} and {@code b}.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-microsoft-module/src/main/java/org/apache/tika/parser/microsoft/onenote/fsshttpb/unsigned/UMath.java