
  -spec erlang:send_after(Time, Dest, Msg, Options) -> TimerRef
                             when
                                 Time :: integer(),
                                 Dest :: pid() | atom(),
                                 Msg :: term(),
                                 Options :: [Option],
                                 Abs :: boolean(),
                                 Option :: {abs, Abs},
                                 TimerRef :: reference().

Since:
  OTP 18.0

  Starts a timer. When the timer expires, the message Msg is sent
  to the process identified by Dest. Apart from the format of the
  time-out message, this function works exactly as 
  erlang:start_timer/4.
