module ActionController::HideActions::ClassMethods

def action_methods

that are listed as hidden methods.
Overrides AbstractController::Base#action_methods to remove any methods 
def action_methods
  @action_methods ||= Set.new(super.reject { |name| hidden_actions.include?(name) })
end

def hide_action(*args)

*args<#to_s>:: A list of actions
==== Parameters

Sets all of the actions passed in as hidden actions. 
def hide_action(*args)
  self.hidden_actions = hidden_actions.dup.merge(args.map(&:to_s)).freeze
end

def inherited(klass) 

def inherited(klass)
  klass.class_eval { @visible_actions = {} }
  super
end

def visible_action?(action_name) 

def visible_action?(action_name)
  return @visible_actions[action_name] if @visible_actions.key?(action_name)
  @visible_actions[action_name] = !hidden_actions.include?(action_name)
end