class_docstr: Key to use when there's only 1 column association in an instance.
class_docstr_tok: ["Key","to","use","when","there","'s","only","1","column","association","in","an","instance","."]
code: def __hash__(self) -> int:  # noqa: D
      return hash(self.__class__.__name__)
  
file_path: metricflow/metricflow/specs/column_assoc.py
imports: from __future__ import annotations
  from abc import ABC, abstractmethod
  from dataclasses import dataclass
  from typing import Any
  from dbt_semantic_interfaces.dataclass_serialization import SerializableDataclass
  from metricflow.specs.specs import InstanceSpec
label_desc: Use image node_id 2 for calling the SingleColumnCorrelationKey obj's underlying member method code with example usage: obj.__hash__() and returns: hash