docs: def set_instances(name, instances, test=False, region=None, key=None, keyid=None,
                           profile=None):
      '''
      Set the instances assigned to an ELB to exactly the list given
  
      CLI example:
  
      .. code-block:: bash
  
          salt myminion boto_elb.set_instances myelb region=us-east-1 instances="[instance_id,instance_id]"
      '''
      ret = True
      current = set([i['instance_id'] for i in get_instance_health(name, region, key, keyid, profile)])
      desired = set(instances)
      add = desired - current
      remove = current - desired
      if test:
          return bool(add or remove)
      if remove:
          if deregister_instances(name, list(remove), region, key, keyid, profile) is False:
              ret = False
      if add:
          if register_instances(name, list(add), region, key, keyid, profile) is False:
              ret = False
      return ret