Generate protobuf schema with oneof type

[dmytroDragan]

Hi guys!
Could you please tell can kafka-connect-datagen generate protobuf schema with oneof type using io.confluent.connect.protobuf.ProtobufConverter?

Currently union avro type like ["string","int"] is translated to message type with multiple fields:

message Union {   string string = 1;    int32 int = 2;  }

while desired schema is:

message Union {   oneof value { string string = 1;   int32 int = 2; } }

Explicit oneof schema setting on schema registry will produce to incompatible schema exception.