You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: buffer.rb
    path of file: ./repos/concurrent-ruby/lib/concurrent-ruby-edge/concurrent/actor/behaviour
    
    the code of the file until where you have to start completion: require 'concurrent/actor/behaviour/abstract'

module Concurrent
  module Actor
    module Beh
    
        def on_event(public, event)
          event_name, _ = event
          case event_name
          when :terminated, :restarted
            @buffer.each { |envelope| reject_envelope envelope }
            @buffer.clear
          end