Added Module#setup

module AbstractController
  module Callbacks
    def self.included(klass)
      klass.class_eval do
        include ActiveSupport::NewCallbacks
        define_callbacks :process_action
        extend ClassMethods
      end
    end
    ...
  end
end
 
## NEW
 
module AbstractController
  module Callbacks
    setup do
      include ActiveSupport::NewCallbacks
      define_callbacks :process_action      
    end
    ...
  end
end