Copy a GXml.Node relaying on GXml.Document to other GXml.Node.
node could belongs from different GXml.Document , while source is a node belonging to given document.
Only GXml.Element objects are supported. For attributes, use GXml.Element.set_attr method, passing source's name and value as arguments.
| doc |
a GXml.Document owning destiny node |
| node |
a GXml.Element to copy nodes to |
| source |
a GXml.Element to copy nodes from, it could be holded by different GXml.Document |