class_docstr: Base node type for nodes in a GroupByItemResolutionDag.
  
  See GroupByItemResolutionDag for more details.
docstr: Called when a visitor needs to visit this node.
docstr_tok: ["Called","when","a","visitor","needs","to","visit","this","node","."]
code: def accept(
      self, visitor: GroupByItemResolutionNodeVisitor[VisitorOutputT]
  ) -> VisitorOutputT:
      """Called when a visitor needs to visit this node."""
      raise NotImplementedError
  
imports: from __future__ import annotations
  from abc import ABC, abstractmethod
  from typing import TYPE_CHECKING, Generic, Sequence
  from typing_extensions import override
  from metricflow.dag.id_prefix import IdPrefix
  from metricflow.dag.mf_dag import DagNode, NodeId
  from metricflow.visitor import Visitable, VisitorOutputT
label_desc: Use image node_id 2 for calling the GroupByItemResolutionNode obj's underlying member method code with example usage: obj.accept(visitor) without return types