presto-main/src/main/java/io/prestosql/type/UuidOperators.java/UuidOperators/isDistinctFrom
class UuidOperators:        @SqlType(StandardTypes.BOOLEAN)
        public static boolean isDistinctFrom(
                @SqlType(StandardTypes.UUID) Slice left,
                @IsNull boolean leftNull,
                @SqlType(StandardTypes.UUID) Slice right,
                @IsNull boolean rightNull)
        {
            if (leftNull != rightNull) {
                return true;
            }
            if (leftNull) {
                return false;
            }
            return notEqual(left, right);
        }