title: Is it possible to write to a specifiv Partition on a Kafka-Topic with MQTT-Proxy from Confluent?
body: <p>Maybe someone can help me solving a little Problem. Is there a way to configure a Partitioning by Key with the Producer built-in the MQTT-Proxy from Confluent?</p>
  <p>There's only a Topic-Mapping-Property, but I've not found how to use the MQTT-Proxy with a Topic partitioned by Key. Can I include the Key for the Kafka-Protocol within the MQTT-Message?</p>
  <p>Thanks Guys.</p>