docs: def getReffs(
              self,
              textId: str,
              level: int=1,
              subreference: Union[str, BaseReference]=None,
              include_descendants: bool=False,
              additional_parameters: Optional[Dict[str, Any]]=None
      ) -> BaseReferenceSet:
          """ Retrieve the siblings of a textual node
  
          :param textId: CtsTextMetadata Identifier
          :type textId: str
          :param level: Depth for retrieval
          :type level: int
          :param subreference: CapitainsCtsPassage Reference
          :type subreference: str
          :param include_descendants:
          :param additional_parameters:
          :return: List of references
          :rtype: [str]
  
          ..toDo :: This starts to be a bloated function....
          """
          raise NotImplementedError()