module ActiveRecord::Acts::List::TopOfListMethodDefiner

def self.call(caller_class, top_of_list)
  caller_class.class_eval do
    define_singleton_method :acts_as_list_top do
      top_of_list.to_i
    end
    define_method :acts_as_list_top do
      top_of_list.to_i
    end
  end
end