*
	 * @since 1.0.0-beta.1
	 * @since 1.0.0-beta.6 Fix translated access plans typo.
	 * @since 1.0.0-beta.18 Remove access_plan.restored topic - access plan post type doesn't support trashing.
	 *
	 * @return array
	 */
	public function get_topics() {

		/**
		 * Filter the available webhook topics.
		 *
		 * @since 1.0.0-beta.1
		 *
		 * @param array $topics Array of topics.
		 */
		return apply_filters(
			'llms_rest_webhook_topics',
			array(
				'course.created'      => __( 'Course created', 'lifterlms' ),
				'course.updated'      => __( 'Course updated', 'lifterlms' ),
				'course.deleted'      => __( 'Course deleted', 'lifterlms' ),
				'course.restored'     => __( 'Course restored', 'lifterlms' ),
				'section.created'     => __( 'Section created', 'lifterlms' ),
				'section.updated'     => __( 'Section updated', 'lifterlms' ),
				'section.deleted'     => __( 'Section deleted', 'lifterlms' ),
				'lesson.created'      => __( 'Lesson created', 'lifterlms' ),
				'lesson.updated'      => __( 'Lesson updated', 'lifterlms' ),
				'lesson.deleted'      => __( 'Lesson deleted', 'lifterlms' ),
				'lesson.restored'     => __( 'Lesson restored', 'lifterlms' ),
				'membership.created'  => __( 'Membership created', 'lifterlms' ),
				'membership.updated'  => __( 'Membership updated', 'lifterlms' ),
				'membership.deleted'  => __( 'Membership deleted', 'lifterlms' ),
				'membership.restored' => __( 'Membership restored', 'lifterlms' ),
				'access_plan.created' => __( 'Access Plan created', 'lifterlms' ),
				'access_plan.updated' => __( 'Access Plan updated', 'lifterlms' ),
				'access_plan.deleted' => __( 'Access Plan deleted', 'lifterlms' ),
				'order.created'       => __( 'Order created', 'lifterlms' ),
				'order.updated'       => __( 'Order updated', 'lifterlms' ),
				'order.deleted'       => __( 'Order deleted', 'lifterlms' ),
				'order.restored'      => __( 'Order restored', 'lifterlms' ),
				'transaction.created' => __( 'Transaction created', 'lifterlms' ),
				'transaction.updated' => __( 'Transaction updated', 'lifterlms' ),
				'transaction.deleted' => __( 'Transaction deleted', 'lifterlms' ),
				'student.created'     => __( 'Student created', 'lifterlms' ),
				'student.updated'     => __( 'Student updated', 'lifterlms' ),
				'student.deleted'     => __( 'Student deleted', 'lifterlms' ),
				'enrollment.created'  => __( 'Enrollment created', 'lifterlms' ),
				'enrollment.updated'  => __( 'Enrollment updated', 'lifterlms' ),
				'enrollment.deleted'  => __( 'Enrollment deleted', 'lifterlms' ),
				'progress.updated'    => __( 'Progress updated', 'lifterlms' ),
				'progress.deleted'    => __( 'Progress deleted', 'lifterlms' ),
				'instructor.created'  => __( 'Instructor created', 'lifterlms' ),