gistfile1.rb

module Termtter
  class Client
    def self.<< val
      puts val
    end
  end

  class Command
  end

  class Hook
  end
end

module Termtter
  Client << Command.new do
  end

  Client << Hook.new do
  end
end

Termtter::Client << Termtter::Command.new do
end

Termtter::Client << Termtter::Hook.new do
end