anchor.diff:  %% {:via, :syn, {:devices, "SN-123-456789"}}
   %% iex> GenServer.start_link(__MODULE__, [], name: tuple)
   %% {ok, #PID<0.105.0>}
  -%% iex> GenServer.call(tuple, :your_message).
  +%% iex> GenServer.call(tuple, :your_message)
   %% :your_message
   %% '''
   %% <h3>Erlang</h3>
  
positive.code: %% <h2>Examples</h2>
  %% <h3>Elixir</h3>
  %% ```
  %% iex> :syn.add_node_to_scopes([:devices]).
  %% :ok
  %% '''
  %% <h3>Erlang</h3>
  
negative.code: %% <h2>Examples</h2>
  %% <h3>Elixir</h3>
  %% ```
  %% iex> :syn.join(:devices, "area-1")
  %% :ok
  %% iex> :syn.members(:devices, "area-1")
  %% [{#PID<0.105.0>, :undefined}]
  %% '''
  %% <h3>Erlang</h3>
  