code: def create_end_of_rib_update():
      
      mpunreach_attr = BGPPathAttributeMpUnreachNLRI(RF_IPv4_VPN.afi,
                                                     RF_IPv4_VPN.safi,
                                                     [])
      eor = BGPUpdate(path_attributes=[mpunreach_attr])
      return eor
docs: Construct end-of-rib (EOR) Update instance.