There are situations where a consumer may not want to immediately
reply to a message even though the message has the replyTo field set.
This change allows a consumer to decide whether or not to reply simply
by not returning a value or message if it doesn't want to reply.
There are situations where a consumer may not want to immediately reply to a message even though the message has the replyTo field set. This change allows a consumer to decide whether or not to reply simply by not returning a value or message if it doesn't want to reply.