
  [;1m-spec system_monitor() -> MonSettings[0m
  [;1m                        when[0m
  [;1m                            MonSettings ::[0m
  [;1m                                undefined | {MonitorPid, Options},[0m
  [;1m                            MonitorPid :: pid(),[0m
  [;1m                            Options :: [system_monitor_option()].[0m

  Returns the current system monitoring settings set by [;;4m[0m
  [;;4merlang:system_monitor/2[0m as [;;4m{MonitorPid, Options}[0m, or [;;4mundefined[0m
  if no settings exist.

  The order of the options can be different from the one that was
  set.
