presto-main/src/main/java/io/prestosql/type/BigintOperators.java/BigintOperators/hashCode
class BigintOperators:    @ScalarOperator(HASH_CODE)
    @SqlType(StandardTypes.BIGINT)
    public static long hashCode(@SqlType(StandardTypes.BIGINT) long value)
    {
        return AbstractLongType.hash(value);
    }