Replaces a child at a particular index with another child.
An integer identifying the position of a node in the receiver's list of child nodes.
NSXMLNode object to replace the object at
The replaced child node is released.
Manipulating Child Nodes
Adds a child node to the end of the list of existing children.
Inserts a child node in the receiver’s list of children at a specific location in the list.
Removes all existing children of the receiver and replaces them with an array of new child nodes.