/src/main/java/org/htmlunit/html/HtmlElement.java
if ( htmlPage != null) {   htmlPage.removeMappedElement( this) ; }
[Delete]
if (parentNode instanceof HtmlElement) { notifyAttributeChangeListeners(event, (HtmlElement) parentNode, oldAttributeValue, notifyMutationObservers); } } private void fireAttributeChangeImpl(final HtmlAttributeChangeEvent event, final HtmlPage htmlPage, final boolean mappedElement, final String oldAttributeValue) { <extra_id_0> htmlPage.addMappedElement(this); } if (ATTRIBUTE_NOT_DEFINED == oldAttributeValue) { fireHtmlAttributeAdded(event); htmlPage.fireHtmlAttributeAdded(event); }