    # File lib/active_resource/custom_methods.rb, line 92
          def post(method_name, options = {}, body = '')
            if new?
              connection.post(custom_method_new_element_url(method_name, options), (body.nil? ? to_xml : body), self.class.headers)
            else
              connection.post(custom_method_element_url(method_name, options), body, self.class.headers)
            end
          end