@classmethod
def import_blackboard_zip(cls, assignment, path, sid_pattern='(?P<id>.*)'):
    """Imports submissions from a ZIP downloaded from Blackboard

        :param str assignment: Assignment associated with this submission

        :param str zip_path: Path to the Blackboard ZIP to import

        :param str sid_pattern: An optional pattern to use to convert
            the name of a submission to a submission id

        :return: A list of Submissions

        """
    raise NotImplementedError("Blackboard import isn't implemented yet :/")
