MigrationDeriverTrait.php

<?php

namespace Drupal\migrate\Plugin;


/**
 * Provides functionality for migration derivers.
 */
trait MigrationDeriverTrait {
  
  /**
   * Returns a fully initialized instance of a source plugin.
   *
   * @param string $source_plugin_id
   *   The source plugin ID.
   *
   * @return \Drupal\migrate\Plugin\MigrateSourceInterface|\Drupal\migrate\Plugin\RequirementsInterface
   *   The fully initialized source plugin.
   */
  public static function getSourcePlugin($source_plugin_id) {
    $definition = [
      'source' => [
        'ignore_map' => TRUE,
        'plugin' => $source_plugin_id,
      ],
      'destination' => [
        'plugin' => 'null',
      ],
      'idMap' => [
        'plugin' => 'null',
      ],
    ];
    return \Drupal::service('plugin.manager.migration')->createStubMigration($definition)
      ->getSourcePlugin();
  }

}