docs: def removeNamedItem(self, item: Attr) -> Optional[Attr]:
          """Set ``Attr`` object and return it (if exists)."""
          from wdom.web_node import WdomElement
          if not isinstance(item, Attr):
              raise TypeError('item must be an instance of Attr')
          if isinstance(self._owner, WdomElement):
              self._owner.js_exec('removeAttribute', item.name)
          removed_item = self._dict.pop(item.name, None)
          if removed_item:
              removed_item._owner = self._owner
          return removed_item