
  -spec erlang:system_time() -> integer().

Since:
  OTP 18.0

  Returns current Erlang system time in native time unit.

  Calling erlang:system_time() is equivalent to 
  erlang:monotonic_time() + erlang:time_offset().

  Note:
    This time is not a monotonically increasing time in the
    general case. For more information, see the documentation of 
    time warp modes in the User's Guide.
