NodeUpdate7008.php

<?php

namespace Drupal\node\Plugin\migrate\process\d6;

use Drupal\migrate\MigrateExecutableInterface;
use Drupal\migrate\ProcessPluginBase;
use Drupal\migrate\Row;

/**
 * Split the 'administer nodes' permission from 'access content overview'.
 *
 * @MigrateProcessPlugin(
 *   id = "node_update_7008"
 * )
 */
class NodeUpdate7008 extends ProcessPluginBase {
    
    /**
     * {@inheritdoc}
     *
     * Split the 'administer nodes' permission from 'access content overview'.
     */
    public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
        if ($value === 'administer nodes') {
            return [
                $value,
                'access content overview',
            ];
        }
        return $value;
    }

}