CoursesCourseWorkPatchOptions

Mask that identifies which fields on the course work to update. This field is required to do an update. The update fails if invalid fields are specified. If a field supports empty values, it can be cleared by specifying it in the update mask and not in the CourseWork object. If a field that does not support empty values is included in the update mask and not set in the CourseWork object, an INVALID_ARGUMENT error is returned. The following fields may be specified by teachers: * title * description * state * due_date * due_time * max_points * scheduled_time * submission_modification_mode * topic_id