code: def deserialize(
      self, ui_value: Optional[bool], widget_id: str = ""
  ) -> bool:
      return bool(ui_value if ui_value is not None else self.value)
  
file_path: streamlit/lib/streamlit/elements/widgets/checkbox.py
imports: from dataclasses import dataclass
  from textwrap import dedent
  from typing import TYPE_CHECKING, Optional, cast
  from streamlit.elements.form import current_form_id
  from streamlit.elements.utils import check_callback_rules, check_session_state_rules, get_label_visibility_proto_value
  from streamlit.proto.Checkbox_pb2 import Checkbox
  from streamlit.runtime.metrics_util import gather_metrics
  from streamlit.runtime.scriptrunner import ScriptRunContext, get_script_run_ctx
  from streamlit.runtime.state import WidgetArgs, WidgetCallback, WidgetKwargs, register_widget
  from streamlit.runtime.state.common import compute_widget_id
  from streamlit.type_util import Key, LabelVisibility, maybe_raise_label_warnings, to_key
label_desc: Use image node_id 2 for calling the CheckboxSerde obj's underlying member method code with example usage: obj.deserialize(ui_value, widget_id) and returns: bool