anchor.diff:  %%
   %% %CopyrightBegin%
   %%
  -%% Copyright Ericsson AB 2016-2019. All Rights Reserved.
  +%% Copyright Ericsson AB 2016-2020. 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.
  
positive.code:       NextEventsR, Hibernate, TimeoutsR, Postpone,
        StateCall, CallbackEvent).
  %%
  loop_state_callback(
    #params{callback_mode = CallbackMode, module = Module} = P,
    Debug, S, Q, {State,Data} = State_Data,
  
negative.code:     %% restored when looping back to loop/3 or loop_event/5.
      %%
      Q = [Event|Events],
      loop_state_callback(P, Debug, S, Q, State_Data, Event).
  
  %% Make a state enter call to the state function, we loop back here
  %% from further down if state enter calls are enabled
  