code: def cli(env, identifier):
      
  
      mgr = SoftLayer.NetworkManager(env.client)
      subnet_id = helpers.resolve_id(mgr.resolve_subnet_ids, identifier,
                                     name='subnet')
  
      if not (env.skip_confirmations or formatting.no_going_back(subnet_id)):
          raise exceptions.CLIAbort('Aborted')
  
      mgr.cancel_subnet(subnet_id)
docs: Cancel a subnet.