docs: def decorator(func):
    r"""Makes the passed decorators to support optional args.
    """
    def wrapper(__decorated__=None, *Args, **KwArgs):
      if __decorated__ is None: # the decorator has some optional arguments.
        return lambda _func: func(_func, *Args, **KwArgs)
  
      else:
        return func(__decorated__, *Args, **KwArgs)
  
    return wrap(wrapper, func)