Karaf 4 - how to set properties for commands

[Martin Lichtin]

In Karaf 3, a command can be defined in Blueprint as:

    <command>
      <action class="my.Cmd">
        <property name="producerTemplate" ref="producerTemplate" />
      </action>
    </command>

where in my case "producerTemplate" comes from a CamelContext created in the 
same Blueprint context.

Now in Karaf 4, how would I do the same, i.e. set the property?

- Martin