@classmethod
def _reset(cls):
    """Reset the max_cv_dict.

        Used in testing, when CVs of the same name get created multiple
        times as part of tests. This is only a problem if you have (in
        memory) multiple CV objects with the same name. That can occur in
        tests (where the entire test suite is run on one import) but should
        never happen in normal practice.
        """
    cls._cv_max_dict = {}
