 
   defp handle_result(result, callback) do
     raise """
-    Expected `#{callback}` to return one of:
+    Expected #{callback} to return one of:
 
         {:noreply, Socket.t} |
         {:noreply, Socket.t, timeout | :hibernate} |


  defp handle_reply(_socket, reply) do
    raise """
    Channel replies from `handle_in/3` are expected to be one of:

        status :: atom
        {status :: atom, response :: map}


  defp handle_result(result, :handle_in) do
    raise """
    Expected handle_in/3 to return one of:

        {:noreply, Socket.t} |
        {:noreply, Socket.t, timeout | :hibernate} |
