bat-8.x-1.x-dev/modules/bat_calendar_reference/bat_calendar_reference.services.yml

services:
  entity.bat_unit_autocomplete_matcher:
    class: Drupal\bat_calendar_reference\BatUnitAutocompleteMatcher
    arguments: ['@plugin.manager.entity_reference_selection']
  entity.bat_event_type_autocomplete_matcher:
    class: Drupal\bat_calendar_reference\BatEventTypeAutocompleteMatcher
    arguments: ['@plugin.manager.entity_reference_selection']