@classmethod
def change_default_dict_keys(cls, primary_name=None, secondary_name=None,
    score_name=None):
    """Change the dict key names - not advised. Params are any dict-key compatible type - cannot be None."""
    if primary_name is not None:
        cls._primary_default_name = primary_name
    if secondary_name is not None:
        cls._secondary_default_name = secondary_name
    if score_name is not None:
        cls._score_default_name = score_name
