code: def remove_reftrack(self, reftrack):
          
          self._reftracks.remove(reftrack)
          refobj = reftrack.get_refobj()
          if refobj and refobj in self._parentsearchdict:
              del self._parentsearchdict[refobj]
docs: Remove the reftrack from the root.
  
          This will not handle row deletion in the model!
          It is automatically done when calling :meth:`Reftrack.delete`.
  
          :param reftrack: the reftrack object to remove
          :type reftrack: :class:`Reftrack`
          :returns: None
          :rtype: None
          :raises: None