/src/main/java/org/htmlunit/html/DomElement.java
if ( child != null) {
if ( prefix == null ) {
final String qualifiedName; if (namespaceURI == null) { qualifiedName = localName; } else { final String prefix = namespaces_ == null ? null : namespaces_.get(namespaceURI); <extra_id_0> qualifiedName = null; } else { qualifiedName = prefix + ':' + localName; } }