/src/main/java/org/htmlunit/html/HtmlElement.java
newNode.attributeListeners_.add( ) ;
newNode.attributeListeners_.clear ( ) ;
} @Override public DomNode cloneNode(final boolean deep) { final HtmlElement newNode = (HtmlElement) super.cloneNode(deep); if (!deep) { synchronized (attributeListeners_) { <extra_id_0> newNode.attributeListeners_.addAll(attributeListeners_); } } return newNode; } }