code: def test_register_new_trial(self):
      lineages = Lineages()
      new_trial = TrialStub(id="new")
      lineage = lineages.register(new_trial)
      assert lineages._lineage_roots == [lineage]
  
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 11 for calling the TestLineages obj's underlying member method code with example usage: obj.test_register_new_trial() without return types