code: def _fill_topology_cfg(self, topo_dict):
          
          cfg_dict = {}
          if topo_dict.bond_member_ports is not None:
              cfg_dict.update({'bond_member_ports':
                               topo_dict.bond_member_ports})
          if topo_dict.bond_interface is not None:
              cfg_dict.update({'bond_interface':
                               topo_dict.bond_interface})
          return cfg_dict
docs: Fills the extra configurations in the topology.