code: def mypy_list_typing() -> None:
      class T(HasTraits):
          latex_command = List(
              ["xelatex", "{filename}", "-quiet"],
              help="Shell command used to compile latex.",
          ).tag(config=True)
  
      t = T()
      reveal_type(
          List(["foo"])
      )  # R: traitlets.traitlets.List[builtins.str]
      reveal_type(
          List([""]).tag(sync=True)
      )  # R: traitlets.traitlets.List[builtins.str]
      reveal_type(
          List(None, allow_none=True)
      )  # R: traitlets.traitlets.List[Never]
      reveal_type(
          List(None, allow_none=True).tag(
              sync=True
          )  # R: traitlets.traitlets.List[Never]
      )
      reveal_type(
          T.latex_command
      )  # R: traitlets.traitlets.List[builtins.str]
      reveal_type(t.latex_command)
  
imports: from __future__ import annotations
  import logging
  import typing
  from abc import ABC
  import pytest
  from traitlets import Any, Bool, CInt, Dict, Enum, HasTraits, Instance, Int, List, Set, TCPAddress, Type, Unicode, Union, default, observe, validate
  from traitlets.config import Config
label_desc: Use image node_id 4 for calling a global function with example usage: mypy_list_typing() without return types