code: def clear_children(self):
      self.children.clear()
  
imports: from abc import ABC, abstractmethod
  from collections import deque
  from typing import Any, List
  from evadb.plan_nodes.types import PlanOprType
label_desc: Use image node_id 7 for calling the AbstractPlan obj's underlying member method code with example usage: obj.clear_children() without return types