def page_exists?(page)
      return false if page.user_data && page.user_data.p_seeded
      @storage.exists?(page) && !page_expired?(page)
    end
def page_exists?(page)
      return false if page.user_data && page.user_data.p_seeded
      @storage.exists?(page) && !page_expired?(page)
    end
whether a page exists or not