code: def _resetUid(self, newUid):
          
          newUid = unicode(newUid)
          self.uid = newUid
          newDefaultParamMap = dict()
          newParamMap = dict()
          for param in self.params:
              newParam = copy.copy(param)
              newParam.parent = newUid
              if param in self._defaultParamMap:
                  newDefaultParamMap[newParam] = self._defaultParamMap[param]
              if param in self._paramMap:
                  newParamMap[newParam] = self._paramMap[param]
              param.parent = newUid
          self._defaultParamMap = newDefaultParamMap
          self._paramMap = newParamMap
          return self
docs: Changes the uid of this instance. This updates both
          the stored uid and the parent uid of params and param maps.
          This is used by persistence (loading).
          :param newUid: new uid to use, which is converted to unicode
          :return: same instance, but with the uid and Param.parent values
                   updated, including within param maps