class IRB::Notifier::LeveledNotifier

def initialize(base, level, prefix)

notifications.
CompositeNotifier group to determine whether or not to output
The given +level+ is used to compare other leveled notifiers in the

send to AbstractNotifier.new
Create a new leveled notifier with the given +base+, and +prefix+ to 
def initialize(base, level, prefix)
  super(prefix, base)
  @level = level
end