protected function get_instructor_roles() {

		/**
		 * Filters the list of user roles served by the instructors REST endpoint.
		 *
		 * @since 1.0.6
		 *
		 * @param string[] $roles List of role keys treated as instructors.
		 */
		return apply_filters(
			'llms_rest_instructor_roles',
			array( 'instructor', 'instructors_assistant' )
		);
	}