code: def postprocess(self, content):
          
          node = content.node
          if len(node.children) and node.hasText():
              return node
          attributes = AttrList(node.attributes)
          if attributes.rlen() and \
              not len(node.children) and \
              node.hasText():
                  p = Factory.property(node.name, node.getText())
                  return merge(content.data, p)
          if len(content.data):
              return content.data
          lang = attributes.lang()
          if content.node.isnil():
              return None
          if not len(node.children) and content.text is None:
              if self.nillable(content):
                  return None
              else:
                  return Text('', lang=lang)
          if isinstance(content.text, basestring):
              return Text(content.text, lang=lang)
          else:
              return content.text
docs: Perform final processing of the resulting data structure as follows:
            - Mixed values (children and text) will have a result of the I{content.node}.
            - Simi-simple values (attributes, no-children and text) will have a result of a
               property object.
            - Simple values (no-attributes, no-children with text nodes) will have a string
               result equal to the value of the content.node.getText().
          @param content: The current content being unmarshalled.
          @type content: L{Content}
          @return: The post-processed result.
          @rtype: I{any}