         opts = defaults opts,
             project_id : required    # determines the destination local hub
             message    : required
-            multi_response : false
             timeout    : undefined
             cb         : undefined
         m = message.local_hub
-                multi_response : opts.multi_response
-                project_id : opts.project_id
-                message    : opts.message
-                timeout    : opts.timeout
+                multi_response : false
+                project_id     : opts.project_id
+                message        : opts.message
+                timeout        : opts.timeout
         if opts.cb?
             f = (err, resp) =>
                 #console.log("call_local_hub:#{misc.to_json(opts.message)} got back #{misc.to_json(err:err,resp:resp)}")


    _do_call: (opts, cb) =>
        if not opts.cb?
            # A call to the backend, but where we do not wait for a response.
            # In order to maintain at least roughly our limit on MAX_CONCURRENT,
            # we simply pretend that this message takes about 150ms

        else
            f = undefined

        @call
            message : m
            timeout : opts.timeout
            cb      : f


    #################################################
