code: def get_list(value):
      
      if value is None:
          return []
      elif value is NotSet:
          return NotSet
      elif isinstance(value, (list, tuple)):
          return list(value)
      elif isinstance(value, six.string_types + (lazy_type, )) or uses_type_registry(value):
          return [value]
      raise ValueError("Invalid type; expected a list, tuple, or string type, found {0}.".format(
          type(value).__name__))
docs: Wraps the given value in a list. ``None`` returns an empty list. Lists and tuples are returned as lists. Single
      strings and registered types are wrapped in a list.
  
      :param value: Value to return as a list.
      :return: List with the provided value(s).
      :rtype: list