class_docstr: Don't transform anything at all.
class_docstr_tok: ["Do","n't","transform","anything","at","all","."]
code: def invalidation_hash(self) -> Hashable:
      # Always return the same hash for these dummy instances.
      return "dummy-style-transformation"
  
imports: from __future__ import annotations
  from abc import ABCMeta, abstractmethod
  from colorsys import hls_to_rgb, rgb_to_hls
  from typing import Callable, Hashable, Sequence
  from prompt_toolkit.cache import memoized
  from prompt_toolkit.filters import FilterOrBool, to_filter
  from prompt_toolkit.utils import AnyFloat, to_float, to_str
  from .base import ANSI_COLOR_NAMES, Attrs
  from .style import parse_color
label_desc: Use image node_id 2 for calling the DummyStyleTransformation obj's underlying member method code with example usage: obj.invalidation_hash() and returns: str