anchor.diff:  			terminate(State#state{http2_machine=HTTP2Machine}, Error)
   	end.
   
  +%% We use this opportunity to mark the HTTP/2 initialization
  +%% as complete if we were still waiting for a SETTINGS frame.
  +maybe_ack(State=#state{http2_init=settings}, Frame) ->
  +	maybe_ack(State#state{http2_init=complete}, Frame);
   maybe_ack(State=#state{socket=Socket, transport=Transport}, Frame) ->
   	case Frame of
   		{settings, _} -> Transport:send(Socket, cow_http2:settings_ack());
  
positive.code: 	cert :: undefined | binary(),
  
  	%% HTTP/2 state machine.
  	http2_init :: sequence | upgrade | complete,
  	http2_machine :: cow_http2_machine:http2_machine(),
  
  	%% Currently active HTTP/2 streams. Streams may be initiated either
  
negative.code: 
  %% HTTP/2 timeouts.
  
  timeout(State=#state{http2_machine=HTTP2Machine0}, Name, TRef) ->
  	case cow_http2_machine:timeout(Name, TRef, HTTP2Machine0) of
  		{ok, HTTP2Machine} ->
  			State#state{http2_machine=HTTP2Machine};
  