def METHOD_NAME(self, element_id=None, xyz_cid0=None):
    i = self._get_sorted_index(self.element_id, element_id,
                               'element_id', 'element_id in %s' % self.type, check=True)
    self.model.log.debug('ielem = %s' % i)
    if xyz_cid0 is None:
        xyz_cid0 = self.model.grid.get_position_by_node_index()
    return self._get_node_locations_by_index(i, xyz_cid0)