'Begin a bulk write operation on course_key.'

def _start_outermost_bulk_operation(self, bulk_write_record, course_key, ignore_case=False):

    bulk_write_record.initial_index = self.db_connection.get_course_index(course_key, ignore_case=ignore_case)
    bulk_write_record.index = copy.deepcopy(bulk_write_record.initial_index)
    bulk_write_record.course_key = course_key
