ds-8.x-3.9/tests/modules/ds_test/src/Plugin/DsField/TestMultipleEntityTypeField.php

<?php

namespace Drupal\ds_test\Plugin\DsField;

use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\ds\Attribute\DsField;
use Drupal\ds\Plugin\DsField\DsFieldBase;

/**
 * Multiple entity type field plugin.
 */
#[DsField(
  id: 'test_multiple_entity_test_field',
  title: new TranslatableMarkup('Multiple entity test field plugin'),
  entity_type: ['node', 'user']
)]
class TestMultipleEntityTypeField extends DsFieldBase {

  /**
   * {@inheritdoc}
   */
  public function build() {
    return ['#markup' => 'Multiple entity test field plugin'];
  }

}