anchor.diff:      Fun.
   
   connect(Props) ->
  -    Transport = proplists:get_value(transport, Props, tcp),
  +    Transport = proplists:get_value(transport, Props, escalus_tcp),
       Server = proplists:get_value(server, Props, <<"localhost">>),
       Host = proplists:get_value(host, Props, Server),
       NewProps = lists:keystore(host, 1, Props, {host, Host}),
  
positive.code: %%%===================================================================
  %%% Behaviour callback
  %%%===================================================================
  -callback connect([proplists:property()]) -> {ok, client()}.
  -callback send(client(), #xmlel{}) -> no_return().
  -callback stop(client()) -> ok | already_stopped.
  
negative.code: -type filter_pred() :: fun((#xmlel{}) -> boolean()) | none.
  -export_type([filter_pred/0]).
  
  -export_type([t/0]).
  
  %% Private
  -export([connection_step/2]).
  
  