def get_submissions_multiple_assignments_by_sis_id(
            self, is_section, sis_id, students=None, assignments=None,
            **params):
        """
        List submissions for multiple assignments by course/section sis id and
        optionally student

        https://canvas.instructure.com/doc/api/submissions.html#method.submissions_api.for_students
        """
        if is_section:
            return self.get_submissions_multiple_assignments(
                is_section, self._sis_id(sis_id, 'section'), students,
                assignments, **params)
        else:
            return self.get_submissions_multiple_assignments(
                is_section, self._sis_id(sis_id, 'course'), students,
                assignments, **params)
List submissions for multiple assignments by course/section sis id and
        optionally student

        https://canvas.instructure.com/doc/api/submissions.html#method.submissions_api.for_students