code: def test_register(self):
      item = [0]
      lineage = LineageNode(item)
      assert lineage.item == item
      assert lineage.item is not item
  
      item = [1]
      lineage.register(item)
      assert lineage.item == item
      assert lineage.item is not item
  
imports: import os
  import random
  import pytest
  from base import ObjectiveStub, TrialStub, build_full_tree, build_population, compare_generations
  from orion.algo.pbt.pbt import LineageNode, Lineages
label_desc: Use image node_id 1 for calling the TestLineageNode obj's underlying member method code with example usage: obj.test_register() without return types