select2_widget-8.x-1.x-dev/select2_widget.routing.yml

select2_widget.entity_autocomplete:
  path: '/select2_entity_reference_autocomplete/{target_type}/{selection_handler}/{selection_settings_key}'
  defaults:
    _controller: '\Drupal\select2_widget\Controller\Select2EntityAutocompleteController::handleAutocomplete'
  requirements:
    _access: 'TRUE'