code: def importNode(self, document, node, deep=0):
          
          nodetype = node.nodeType
          if nodetype in (node.DOCUMENT_NODE, node.DOCUMENT_TYPE_NODE):
              raise DOMException('Illegal node type for importNode')
          if nodetype == node.ENTITY_REFERENCE_NODE:
              deep = 0
          clone = node.cloneNode(deep)
          self._setOwnerDoc(document, clone)
          clone.__imported__ = 1
          return clone
docs: Implements (well enough for our purposes) DOM node import.