code: def __repr__(self):
      return self.id
  
imports: from orion.algo.pbt.exploit import BaseExploit
  from orion.algo.pbt.explore import BaseExplore
  from orion.algo.pbt.pbt import LineageNode, Lineages
  from orion.core.utils.pptree import print_tree
  from orion.core.worker.trial import Trial
label_desc: Use image node_id 2 for calling the TrialStub obj's underlying member method code with example usage: obj.__repr__() and returns: self