presto-google-sheets/src/main/java/io/prestosql/plugin/google/sheets/SheetsRecordCursor.java/SheetsRecordCursor/getSlice
class SheetsRecordCursor:    @Override
    public Slice getSlice(int field)
    {
        checkFieldType(field, createUnboundedVarcharType());
        return Slices.utf8Slice(getFieldValue(field));
    }