anchor.diff:  
   server_start_command_handler(Node, Commands) ->
       start_command_handler(Node, Commands, #server{}, "server").
  +%% server_start_command_handler(Node, Commands) ->
  +%%     start_command_handler(Node, Commands, #{}, "server").
   
   server_start_transport(State) when is_record(State, server) ->
       case (catch megaco_tcp:start_transport()) of
   	{ok, Ref} ->
   	    {ok, State#server{transport_ref = Ref}};
  +	Error ->
  +	    Error
  +    end;
  +server_start_transport(State) when is_map(State) ->
  +    case (catch megaco_tcp:start_transport()) of
  +	{ok, Ref} ->
  +	    {ok, State#{transport_ref => Ref}};
   	Error ->
   	    Error
       end.
  
positive.code: %% Macros
  %%----------------------------------------------------------------------
  
  -define(TEST_VERBOSITY, debug).
  
  
  
negative.code: %%
  %% %CopyrightBegin%
  %% 
  %% Copyright Ericsson AB 2000-2020. All Rights Reserved.
  %% 
  %% Licensed under the Apache License, Version 2.0 (the "License");
  %% you may not use this file except in compliance with the License.
  