foreach ( $alert_triggers as $alert_trigger ) {
            $file_location = $this->plugin->locations['dir'] . '/alerts/class-alert-trigger-' . $alert_trigger . '.php';
            if ( file_exists( $file_location ) ) {
                include_once $file_location;
                $class_name = sprintf( '\WP_Stream\Alert_Trigger_%s', str_replace( '-', '_', $alert_trigger ) );