code: def address_target_pairs_from_address_families(self, address_families):
      
      single_af = assert_single_element(address_families)
      addr_tgt_pairs = [
        (addr, tgt) for addr, tgt in single_af.addressables.items()
        if addr.target_name == self.name
      ]
      if len(addr_tgt_pairs) == 0:
        raise self._SingleAddressResolutionError(single_af, self.name)
      # There will be at most one target with a given name in a single AddressFamily.
      assert(len(addr_tgt_pairs) == 1)
      return addr_tgt_pairs
docs: Return the pair for the single target matching the single AddressFamily, or error.
  
      :raises: :class:`SingleAddress._SingleAddressResolutionError` if no targets could be found for a
               :class:`SingleAddress` instance.
      :return: list of (Address, Target) pairs with exactly one element.