code: def get_trials(self, lineages, trial):
      return lineages.get_trials_at_depth(trial)
  
imports: import numpy
  import pytest
  from base import RNGStub, TrialStub
  from orion.algo.pbt.exploit import BacktrackExploit, PipelineExploit, TruncateExploit
  from orion.algo.pbt.pbt import Lineages
label_desc: Use image node_id 6 for calling the TruncateGenericTests obj's underlying member method code with example usage: obj.get_trials(lineages, trial) and returns: lineages