src/main/java/org/jsoup/nodes/Node.java
/**
     Get this node's previous sibling.
     @return the previous sibling, or null if this is the first sibling
     */
Get this node's previous sibling.
Get this node ' s previous sibling .
public Node previousSibling() {
        List<Node> siblings = parentNode.childNodes;
        Integer index = indexInList(this, siblings);
        Validate.notNull(index);
        if (index > 0)
            return siblings.get(index-1);
        else
            return null;
    }
public Node previousSibling ( ) { List < Node > siblings = parentNode . childNodes ; Integer index = indexInList ( this , siblings ) ; Validate . notNull ( index ) ; if ( index > 0 ) return siblings . get ( index - 1 ) ; else return null ; }
Get this node's previous sibling.
Get this node ' s previous sibling .