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[Exposed=Window]
interface HTMLPersistentWidgetElement : HTMLElement {
[Reflect, URL, CEReactions] attribute USVString src;
[Reflect, CEReactions] attribute DOMString name;
undefined postMessage(any message, USVString targetOrigin);
undefined postMessage(any message, optional WindowPostMessageOptions options = {});
};
[Exposed=Window]
interface PersistentWidgetOpener : EventTarget {
undefined postMessage(any message, USVString targetOrigin);
undefined postMessage(any message, optional WindowPostMessageOptions options = {});
};
partial interface Window {
[SameObject] readonly attribute PersistentWidgetOpener? persistentWidgetOpener;
};
partial interface mixin WindowEventHandlers {
attribute EventHandler onopenerchange;
};