in hpcpack-autoscaler/src/cyclecloud-hpcpack/commonutil.py [0:0]
def ci_set(a:Union[List[str], Set[str]]) -> Set[str]:
dic: Dict[str, str] = {}
for c in a:
if c.casefold() in dic:
continue
dic[c.casefold()] = c
return set(dic.values())