__define_runner

# File activesupport/lib/active_support/callbacks.rb, line 380
      def __define_runner(symbol) #:nodoc:
        runner_method = "_run_#{symbol}_callbacks" 
        unless private_method_defined?(runner_method)
          class_eval             def #{runner_method}(key = nil, &blk)              self.class.__run_callback(key, :#{symbol}, self, &blk)            end            private :#{runner_method}, __FILE__, __LINE__ + 1
        end
      end