Method Parser.XML.Tree.AbstractNode()->add_child()
- Method add_child
 AbstractNodeadd_child(AbstractNodec)- Description
 Adds the node
cto the list of children of this node. The node is added before the nodeold, which is assumed to be an existing child of this node. The node is added first ifoldis zero.- Note
 Returns the new child node, NOT the current node.
- Returns
 The new child node is returned.