code: def update_vrf_table_links(self, vrf_table, new_imp_rts,
                                 removed_imp_rts):
          
          assert vrf_table
          if new_imp_rts:
              self._link_vrf_table(vrf_table, new_imp_rts)
          if removed_imp_rts:
              self._remove_links_to_vrf_table_for_rts(vrf_table,
                                                      removed_imp_rts)
docs: Update mapping from RT to VRF table.