# File lib/apipie/application.rb, line 34
    def define_method_description(controller, method_name, versions = [])
      return if ignored?(controller, method_name)
      ret_method_description = nil

      versions = controller_versions(controller) if versions.empty?

      versions.each do |version|
        resource_name_with_version = "#{version}##{get_resource_name(controller)}"
        resource_description = get_resource_description(resource_name_with_version)

        if resource_description.nil?
          resource_description = define_resource_description(controller, version)
        end

        method_description = Apipie::MethodDescription.new(method_name, resource_description, self)

        # we create separate method description for each version in
        # case the method belongs to more versions. We return just one
        # becuase the version doesn't matter for the purpose it's used
        # (to wrap the original version with validators)
        ret_method_description ||= method_description
        resource_description.add_method_description(method_description)
      end

      return ret_method_description
    end