code: def add_local(route_dist, prefix, next_hop, route_family=VRF_RF_IPV4):
      
      try:
          # Create new path and insert into appropriate VRF table.
          tm = CORE_MANAGER.get_core_service().table_manager
          label = tm.update_vrf_table(route_dist, prefix, next_hop, route_family)
          # Currently we only allocate one label per local_prefix,
          # so we share first label from the list.
          if label:
              label = label[0]
  
          # Send success response with new label.
          return [{ROUTE_DISTINGUISHER: route_dist, PREFIX: prefix,
                   VRF_RF: route_family, VPN_LABEL: label}]
      except BgpCoreError as e:
          raise PrefixError(desc=e)
docs: Adds *prefix* from VRF identified by *route_dist* and sets the source as
      network controller.