message: Inherited proxy registry from registry
diff: -class SharedElementRegistryProxy {
  +import SharedElementRegistry from './SharedElementRegistry';
  +
  +class SharedElementRegistryProxy extends SharedElementRegistry {
  registerSharedElement(scene: number, name: string, ref: HTMLElement, data) {
  var eventData = {bubbles: true, detail: {name, data, share: true}};
  ref.dispatchEvent(new CustomEvent('share', eventData));
  