code: def add_nexusnve_binding(vni, switch_ip, device_id, mcast_group):
      
      LOG.debug("add_nexusnve_binding() called")
      session = bc.get_writer_session()
      binding = nexus_models_v2.NexusNVEBinding(vni=vni,
                                                switch_ip=switch_ip,
                                                device_id=device_id,
                                                mcast_group=mcast_group)
      session.add(binding)
      session.flush()
      return binding
docs: Adds a nexus nve binding.