method_missing

# File activesupport/lib/active_support/per_thread_registry.rb, line 44
      def method_missing(name, *args, &block) # :nodoc:
        # Caches the method definition as a singleton method of the receiver.
        define_singleton_method(name) do |*a, &b|
          instance.public_send(name, *a, &b)
        end

        send(name, *args, &block)
      end