action_methods

# File actionpack/lib/action_controller/base.rb, line 1362
      def self.action_methods
        @action_methods ||=
          # All public instance methods of this class, including ancestors
          public_instance_methods(true).map { |m| m.to_s }.to_set -
          # Except for public instance methods of Base and its ancestors
          Base.public_instance_methods(true).map { |m| m.to_s } +
          # Be sure to include shadowed public instance methods of this class
          public_instance_methods(false).map { |m| m.to_s } -
          # And always exclude explicitly hidden actions
          hidden_actions
      end