Hi there, Could you please add the ability to use session attributes in the avro object builder. For example, I use this code ``` exec( _.set("text", "Hello")) .exec( kafka("incomeMsg") .send("myTopic", AvroObject .newBuilder() .setMessage("${text}") .build()) ) ``` I expect that the instance of AvroObject will contain field "Message"="Hello", but it's equal to "${text}", like String