code: def doc() -> None:
      import webbrowser
  
      webbrowser.open("https://bashtage.github.io/arch/")
  
imports: from ._version import version, version_tuple
  from .univariate.mean import arch_model
  from .utility import test
label_desc: Use image node_id 1 for calling a global function with example usage: doc() without return types