code: function createAnnotationReference(object) {
      var options = {
        type: 'reference',
        object: object
      };
  
      var findEntry = function findEntry(entry) {
        return entry.type === options.type && entry.object === options.object;
      };
  
      if (scope.internal.getPageInfo(object.page).pageContext.annotations.find(findEntry) === undefined) {
        scope.internal.getPageInfo(object.page).pageContext.annotations.push(options);
      }
    }
docs: Create the Reference to the widgetAnnotation, so that it gets referenced
  in the Annot[] int the+ (Requires the Annotation Plugin)