code: def get_reffs(self, objectId, subreference=None, collection=None, export_collection=False):
          
          if collection is not None:
              text = collection
          else:
              text = self.get_collection(objectId)
          reffs = self.chunk(
              text,
              lambda level: self.resolver.getReffs(objectId, level=level, subreference=subreference)
          )
          if export_collection is True:
              return text, reffs
          return reffs
docs: Retrieve and transform a list of references.
  
          Returns the inventory collection object with its metadata and a callback function taking a level parameter \
          and returning a list of strings.
  
          :param objectId: Collection Identifier
          :type objectId: str
          :param subreference: Subreference from which to retrieve children
          :type subreference: str
          :param collection: Collection object bearing metadata
          :type collection: Collection
          :param export_collection: Return collection metadata
          :type export_collection: bool
          :return: Returns either the list of references, or the text collection object with its references as tuple
          :rtype: (Collection, [str]) or [str]