geolocation-8.x-3.x-dev/modules/geolocation_leaflet/geolocation_leaflet.routing.yml

geolocation_leaflet.nominatim_settings:
  path: '/admin/config/services/geolocation/nominatim'
  defaults:
    _form:  '\Drupal\geolocation_leaflet\Form\NominatimGeocodingSettings'
    _title: 'Nominatim geocoding settings'
  requirements:
    _permission: 'configure geolocation'