docstr: Get the help string for this class in ReST format.
  
  If `inst` is given, its current trait values will be used in place of
  class defaults.
code: def class_get_help(cls, inst: HasTraits | None = None) -> str:
      """Get the help string for this class in ReST format.
  
      If `inst` is given, its current trait values will be used in place of
      class defaults.
      """
      assert inst is None or isinstance(inst, cls)
      final_help = []
      base_classes = ", ".join(p.__name__ for p in cls.__bases__)
      final_help.append(f"{cls.__name__}({base_classes}) options")
      final_help.append(len(final_help[0]) * "-")
      for _, v in sorted(cls.class_traits(config=True).items()):
          help = cls.class_get_trait_help(v, inst)
          final_help.append(help)
      return "\n".join(final_help)
  
imports: from __future__ import annotations
  import logging
  import typing
  from copy import deepcopy
  from textwrap import dedent
  from traitlets.traitlets import Any, Container, Dict, HasTraits, Instance, TraitType, default, observe, observe_compat, validate
  from traitlets.utils import warnings
  from traitlets.utils.bunch import Bunch
  from traitlets.utils.text import indent, wrap_paragraphs
  from .loader import Config, DeferredConfig, LazyConfigValue, _is_section_key
label_desc: Use image node_id 7 for calling the Configurable obj's underlying member method code with example usage: obj.class_get_help(cls, inst) and returns: str