class MigratePostRowSaveEvent

class MigratePostRowSaveEvent extends MigratePreRowSaveEvent {
    
    /**
     * The row's destination ID.
     *
     * @var array|bool
     */
    protected $destinationIdValues = [];
    
    /**
     * Constructs a post-save event object.
     *
     * @param \Drupal\migrate\Plugin\MigrationInterface $migration
     *   Migration entity.
     * @param \Drupal\migrate\MigrateMessageInterface $message
     *   The message interface.
     * @param \Drupal\migrate\Row $row
     *   Row object.
     * @param array|bool $destination_id_values
     *   Values represent the destination ID.
     */
    public function __construct(MigrationInterface $migration, MigrateMessageInterface $message, Row $row, $destination_id_values) {
        parent::__construct($migration, $message, $row);
        $this->destinationIdValues = $destination_id_values;
    }
    
    /**
     * Gets the destination ID values.
     *
     * @return array
     *   The destination ID as an array.
     */
    public function getDestinationIdValues() {
        return $this->destinationIdValues;
    }

}