class Aws::Rails::Notifications

@api private
<operation>.<service>.aws
Each client operation will produce an event with name:
Instruments client operation calls for ActiveSupport::Notifications

def add_handlers(handlers, config) 

def add_handlers(handlers, config)
  # This plugin needs to be first
  # which means it is called first in the stack, to start recording time,
  # and returns last
  handlers.add(Handler, step: :initialize, priority: 99)
end