docs: def maybe(cls, val: Optional[T]) -> 'Option[T]':
          """
          Shortcut method to return ``Some`` or :py:data:`NONE` based on ``val``.
  
          Args:
              val: Some value.
  
          Returns:
              ``Some(val)`` if the ``val`` is not None, otherwise :py:data:`NONE`.
  
          Examples:
              >>> Option.maybe(0)
              Some(0)
              >>> Option.maybe(None)
              NONE
          """
          return cast('Option[T]', NONE) if val is None else cls.Some(val)