Wrapper a row obejct for pekko-connectors

[laglangyue]

I am using pekko to build ETL app，like this

reader -> flow-> writer.

I would use pekko-connector to build the reader/writer, I find a questtion is that our connector's input and output are not unified，some is bytestring，some is type T and so on.
so I will change my app,

reader(pekko-connectors) -> row-map-function -> pekko streams flow -> row-map-function -> writer(pekko-connectors)

Which I want to discussion with the community is that can we provide a simple row, like a jdbc row for connectors.
If we implement this unified row, different pekko-connectors can freely connect to each other.

[laglangyue]

For me, I can use Spark SQL Row and implement function to map the input and output for pekko-connectors. I am not sure if other members of pekko-community have meet this problem.