anchor.diff:           api_a_recvmsg_cancel_udp4/1,
            api_a_accept_cancel_tcp4/1,
            api_a_recv_cancel_tcp4/1,
  -         %% api_a_recvmsg_cancel_tcp4/1,
  +         api_a_recvmsg_cancel_tcp4/1,
   
            %% *** API Options ***
            api_opt_simple_otp_options/1,
  
positive.code:            fun() ->
                     Recv = fun(Sock) ->
                                    socket:recv(Sock, 0, nowait)
                            end,
                     InitState = #{domain => inet,
                                   recv   => Recv},
  
negative.code:      api_a_recvfrom_cancel_udp4,
       api_a_recvmsg_cancel_udp4,
       api_a_accept_cancel_tcp4,
       api_a_recv_cancel_tcp4,
       api_a_recvmsg_cancel_tcp4
      ].
  
  api_options_cases() ->
  