Use Avro Serializer for event Key

[andres101]

I would like to use the KafkaFlow.Serializer.SchemaRegistry.ConfluentAvro serializer to serialize the key of my event, not just the value.

I'm looking for the equivalent of: Confluent.Kafka.ProducerBuilder.SetKeySerializer

Example usage:

var producer = new ProducerBuilder<string, ISpecificRecord>(producerConfig)
    .SetKeySerializer(new AvroSerializer<string>(schemaRegistry))
    .SetValueSerializer(new AvroSerializer<ISpecificRecord>(schemaRegistry, avroSerializerConfig))
    .Build();

I've searched the documentation and code and cannot see how to do this. Do you have any suggestions?