presto-main/src/main/java/io/prestosql/operator/scalar/StringFunctions.java/StringFunctions/castVarcharToCodePoints
class StringFunctions:    @ScalarOperator(OperatorType.CAST)
    @LiteralParameters("x")
    @SqlType(CodePointsType.NAME)
    public static int[] castVarcharToCodePoints(@SqlType("varchar(x)") Slice slice)
    {
        return castToCodePoints(slice);
    }