docs: def contains_no_backer(self, addr):
          """
          Tests if the address is contained in any page of paged memory, without considering memory backers.
  
          :param int addr: The address to test.
          :return: True if the address is included in one of the pages, False otherwise.
          :rtype: bool
          """
  
          for i, p in self._pages.items():
              if i * self._page_size <= addr < (i + 1) * self._page_size:
                  return addr - (i * self._page_size) in p.keys()
          return False