code: def set_id(self, identifier):
          
          self._id = identifier
          refobj = self.get_refobj()
          if refobj:
              self.get_refobjinter().set_id(refobj, identifier)
docs: Set the id of the given reftrack
  
          This will set the id on the refobject
  
          :param identifier: the identifier number
          :type identifier: int
          :returns: None
          :rtype: None
          :raises: None