code: def serialize(self, v: Number | None) -> Number | None:
      return v
  
imports: from __future__ import annotations
  import numbers
  from dataclasses import dataclass
  from textwrap import dedent
  from typing import Literal, Union, cast, overload
  import streamlit
  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.errors import StreamlitAPIException
  from streamlit.js_number import JSNumber, JSNumberBoundsException
  from streamlit.proto.NumberInput_pb2 import NumberInput
  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 1 for calling the NumberInputSerde obj's underlying member method code with example usage: obj.serialize(v) and returns: v