                            other_coordinate, rtt})
   end
 
-  # For testing purposes only... 
   def handle_call(:get_coordinate, _from, {config, coordinate}) do
     {:reply, coordinate, {config, coordinate}}
   end

                  _from, {config, my_coordinate}) do
    
    my_new_coordinate = vivaldi(config, my_coordinate, other_coordinate, rtt)

    unless config[:local_mode?] do
      # Send coordinate-update event

      }
      CoordinateLogger.log(my_node_id, event)
    end
    Logger.info "#{my_node_id} - coordinate changed from #{inspect my_coordinate} to #{inspect my_new_coordinate}"
    {:reply, :ok, {config, my_new_coordinate}}
  end

