/src/main/java/org/htmlunit/html/HtmlPage.java
executeRefreshIfNeeded( Event.TYPE_UNLOAD) ;
executeEventHandlersIfNeeded ( Event.TYPE_UNLOAD ) ;
if (cleaning_) { return; } cleaning_ = true; try { super.cleanUp(); <extra_id_0> deregisterFramesIfNeeded(); } finally { cleaning_ = false; if (autoCloseableList_ != null) { for (final AutoCloseable closeable : new ArrayList<>(autoCloseableList_)) {