there's a school of thought that says you should ~never use `import *` because it can create unexpected dependencies (e.g. if .util imports datetime and then this module accidentally starts referencing it without importing it explicitly). i don't mind too much, but another pattern you can do that gets around this is to do `import corehq.apps.importer.util as importer_util` and then call stuff like `importer_util.foo()`