docstr: Get the help string for a single trait and print it.
code: def class_print_help(cls, inst: HasTraits | None = None) -> None:
      """Get the help string for a single trait and print it."""
      print(cls.class_get_help(inst))
  
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 9 for calling the Configurable obj's underlying member method code with example usage: obj.class_print_help(cls, inst) without return types