class_docstr: Outputs group-by-items for a measure.
class_docstr_tok: ["Outputs","group-by-items","for","a","measure","."]
code: def parent_nodes(self) -> Sequence[GroupByItemResolutionNode]:
      return ()
  
file_path: metricflow/metricflow/query/group_by_item/resolution_dag/resolution_nodes/measure_source_node.py
imports: from __future__ import annotations
  from typing import List, Sequence
  from dbt_semantic_interfaces.references import MeasureReference, MetricReference
  from typing_extensions import override
  from metricflow.dag.id_prefix import IdPrefix
  from metricflow.dag.mf_dag import DisplayedProperty
  from metricflow.query.group_by_item.resolution_dag.resolution_nodes.base_node import GroupByItemResolutionNode, GroupByItemResolutionNodeVisitor
  from metricflow.visitor import VisitorOutputT
label_desc: Use image node_id 4 for calling the MeasureGroupByItemSourceNode obj's underlying member method code with example usage: obj.parent_nodes() and returns: 