code: function bypassInsert(parent, field, elem) {
          OperationBuilder.begin("bypassInsert", true);
          OperationBuilder.insert(elem);
          OperationBuilder.fieldInsert(parent, field, elem);
          OperationBuilder.end();
          doOperation(OperationBuilder.getOperation());
      }
docs: Insert an element to an array field. This will not insert an Operation into UndoStack (bypass = true). Use it carefully.
  @param {Core.Element} parent Field owner.
  @param {string} field Field name.
  @param {Core.Element} elem An element to be inserted.