Adding the category for a custom entity reference field add other fields to the same category

Question

I have a custom entity reference field working well, but once I added the category to it the other entity reference fields appeared in the same category.

Here is my code:

/**
 * Plugin implementation of the 'region_token' field type.
 *
 * @FieldType(
 *   id = "region_token",
 *   label = @Translation("Region Token"),
 *   description = @Translation("Region custom token."),
 *   category = @Translation("Tokens"),
 *   default_widget = "region_select_widget",
 *   default_formatter = "region_formatter",
 * )
 */
class RegionToken extends EntityReferenceItem {

Any idea about how to fix this?

Answer 1

I fixed the problem by adding the following code to the class

  /**
   * {@inheritdoc}
   */
  public static function getPreconfiguredOptions() {
    return [];
  }