docs: def serialize_to_list(self, name, datas):
          """
          Serialize given datas to a list structure.
  
          List structure is very simple and only require a variable ``--items``
          which is a string of values separated with an empty space. Every other
          properties are ignored.
  
          Arguments:
              name (string): Name only used inside possible exception message.
              datas (dict): Datas to serialize.
  
          Returns:
              list: List of serialized reference datas.
          """
          items = datas.get('items', None)
          splitter = datas.get('splitter', self._DEFAULT_SPLITTER)
  
          if items is None:
              msg = ("List reference '{}' lacks of required 'items' variable "
                     "or is empty")
              raise SerializerError(msg.format(name))
          else:
              items = self.value_splitter(name, 'items', items, mode=splitter)
  
          return items