code: def children(self, new_children):
      self._children = new_children
  
file_path: evadb/evadb/optimizer/group_expression.py
imports: from typing import List
  from evadb.constants import UNDEFINED_GROUP_ID
  from evadb.optimizer.operators import Operator
  from evadb.optimizer.rules.rules_base import RuleType
label_desc: Use image node_id 6 for calling the GroupExpression obj's underlying member method code with example usage: obj.children(new_children) without return types