new MessageEnvelope(new KeepAliveResponse(JsonMessageTests.MessageId, JsonMessageTests.Source,
new MessageEnvelope(new KeepAliveRequest(JsonMessageTests.MessageId, JsonMessageTests.Source,
new MessageEnvelope(new KeepAliveResponse(JsonMessageTests.MessageId, JsonMessageTests.Source,
new MessageEnvelope(new KeepAliveRequest(JsonMessageTests.MessageId, JsonMessageTests.Source,