anchor.diff:        Client :: client(),
         Filter :: simple_xml() | xpath(),
         Timeout :: timeout(),
  -      Result :: {ok,simple_xml()} | {error,error_reason()}.
  +      Result :: {ok,[simple_xml()]} | {error,error_reason()}.
   %% @doc Get data.
   %%
   %% This operation returns both configuration and state data from the
  
positive.code:       Client :: client(),
        SimpleXml :: simple_xml(),
        Timeout :: timeout(),
        Result :: ok | {error,error_reason()}.
  %% @doc Send an XML document to the server.
  %%
  %% The given XML document is sent as is to the server. This function
  
negative.code:       Client :: client(),
        Action :: simple_xml(),
        Timeout :: timeout(),
        Result :: {ok,[simple_xml()]} | {error,error_reason()}.
  %% @doc Execute an action.
  %%
  %% @end
  