Hi there, I was looking at oslo_config/cfg.py[*], and the StrOpt() class has 'choices' parameter, to allow a sequence of valid values / tuples of valid values for descriptions. However, I don't see the same 'choices' parameter for the ListOpt() class. Out of curiosity, is there a reason to not add it for ListOpt() too? [*] https://git.openstack.org/cgit/openstack/oslo.config/tree/oslo_config/cfg.py#n1271 -- /kashyap