module ActiveSupport::Notifications

two events.
duration is important. For example, computing elapsed time between
Daylights Savings). Use +monotonic_subscribe+ when accuracy of time
time. Monotonic time will not jump forward or backward (due to NTP or
+finish+ block arguments are in monotonic time instead of wall-clock
Performs the same functionality as #subscribe, but the +start+ and

def monotonic_subscribe(pattern = nil, callback = nil, &block)
  notifier.subscribe(pattern, callback, monotonic: true, &block)
end