in usort/types.py [0:0]
def imported_names(self) -> Dict[str, str]:
results: Dict[str, str] = {}
for item in self.items:
key = item.asname or item.name
if self.stem is None and not item.asname:
key = top_level_name(item.name)
value = key
else:
value = item.fullname
results[key] = value
return results