/src/main/java/org/htmlunit/html/HtmlDomTreeWalker.java
if ( ( n == ( root_) ) || ( n == null) ) {   return null; }
[Delete]
return null; } currentNode_ = newNode; return newNode; } public DomNode previousSibling() { <extra_id_0> return null; } final DomNode newNode = getEquivalentLogical(currentNode_.getPreviousSibling(), true); if (newNode != null) { currentNode_ = newNode; }