docs: def startLoading(self):
          """
          Starts loading this item for the batch.
          """
          if super(XBatchItem, self).startLoading():
              tree = self.treeWidget()
              if not isinstance(tree, XOrbTreeWidget):
                  self.takeFromTree()
                  return
              
              next_batch = self.batch()
              tree._loadBatch(self, next_batch)