* @return void
	 */
	private function load() {

		$triggers = array(
			'achievement_earned',
			'certificate_earned',
			'course_complete',
			'course_track_complete',
			'enrollment',
			'lesson_complete',
			'manual_payment_due',
			'payment_retry',
			'purchase_receipt',
			'quiz_failed',
			'quiz_graded',
			'quiz_passed',
			'section_complete',
			'student_welcome',
			'subscription_cancelled',
			'upcoming_payment_reminder',
		);

		foreach ( $triggers as $name ) {

			$this->load_controller( $name );
			$this->load_view( $name );

		}

		$processors = array(
			'email',
		);

		foreach ( $processors as $name ) {
			$this->load_processor( $name );
		}

		/**
		 * Run an action after all core notification classes are loaded.
		 *
		 * Third party notifications can hook into this action.
		 * Use `load_view()`, `load_controller()`, and `load_processor()` methods
		 * to load notifications into the class and be auto-called by the core APIs.
		 *
		 * @since Unknown
		 *
		 * @param LLMS_Notifications $this Instance of the notifications singleton.
		 */
		do_action( 'llms_notifications_loaded', $this );