openlayers-8.x-4.x-dev/modules/openlayers_geofield/src/Plugin/Control/Geofield/js/geofield.js

Drupal.openlayersPluginManager.register({
  fs: 'openlayers.Control:Geofield',
  init: function(data) {
    return new GeofieldDraw(data.opt);
  }
});