docs: def _get_dvs(service_instance, dvs_name):
      '''
      Return a reference to a Distributed Virtual Switch object.
  
      :param service_instance: PyVmomi service instance
      :param dvs_name: Name of DVS to return
      :return: A PyVmomi DVS object
      '''
      switches = list_dvs(service_instance)
      if dvs_name in switches:
          inventory = get_inventory(service_instance)
          container = inventory.viewManager.CreateContainerView(inventory.rootFolder, [vim.DistributedVirtualSwitch], True)
          for item in container.view:
              if item.name == dvs_name:
                  return item
  
      return None