chromium/third_party/blink/renderer/core/dom/element_definition_options.idl

// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Spec: https://html.spec.whatwg.org/C/#elementdefinitionoptions
dictionary ElementDefinitionOptions {
    DOMString? extends = null;
};