class_docstr: Keys we can group by. 
class_docstr_tok: ["Keys","we","can","group","by","."]
docstr: Name of this key. 
docstr_tok: ["Name","of","this","key","."]
code: def key_name(self) -> str:
      """Name of this key."""
      return self.name.lower()
  
imports: import heapq
  from dataclasses import dataclass
  from enum import Enum
  from typing import Any, Collection, Iterator, List, Sequence, Tuple, Type
  import pandas
  from benchmark.metadata import BenchmarkMetadata
  from benchmark.plotter_api import Plotter
label_desc: Use image node_id 1 for calling the GroupingKey obj's underlying member method code with example usage: obj.key_name() and returns: self