openlayers-8.x-4.x-dev/src/Plugin/Interaction/PinchZoom/js/pinchzoom.js

Drupal.openlayersPluginManager.register({
  fs: 'openlayers.Interaction:PinchZoom',
  init: function(data) {
    return new ol.interaction.PinchZoom(data.opt);
  }
});