presto-redis/src/main/java/io/prestosql/plugin/redis/RedisRecordCursor.java/RedisRecordCursor/getFieldValueProvider
class RedisRecordCursor:    private FieldValueProvider getFieldValueProvider(int field, Class<?> expectedType)
    {
        checkArgument(field < columnHandles.size(), "Invalid field index");
        checkFieldType(field, expectedType);
        return currentRowValues[field];
    }