reverse! (LazyArray)

    # File lib/extlib/lazy_array.rb, line 147
      def reverse!
        # reverse without kicking if possible
        if loaded?
          @array = @array.reverse
        else
          @head, @tail = @tail.reverse, @head.reverse

          proc = @load_with_proc

          @load_with_proc = lambda do |v|
            proc.call(v)
            v.instance_variable_get(:@array).reverse!
          end
        end

        self
      end