class_docstr: A base class for creating widgets that represent booleans.
code: def __init__(self, value=None, **kwargs):
      if value is not None:
          kwargs["value"] = value
      super().__init__(**kwargs)
  
imports: from .widget_description import DescriptionStyle, DescriptionWidget
  from .widget_core import CoreWidget
  from .valuewidget import ValueWidget
  from .widget import register, widget_serialization
  from .trait_types import Color, InstanceDict
  from traitlets import Unicode, Bool, CaselessStrEnum
label_desc: Use image node_id 1 to create a new _Bool object from inherited base classes: DescriptionWidget, ValueWidget, CoreWidget with example: obj = _Bool(value)