code: def forward(self, posterior: GPyTorchPosterior) -> GPyTorchPosterior:
      pass
  
imports: import torch
  from botorch.acquisition.multi_objective.analytic import ExpectedHypervolumeImprovement, MultiObjectiveAnalyticAcquisitionFunction
  from botorch.acquisition.multi_objective.objective import IdentityMCMultiOutputObjective
  from botorch.acquisition.objective import PosteriorTransform
  from botorch.exceptions.errors import BotorchError, UnsupportedError
  from botorch.posteriors import GPyTorchPosterior
  from botorch.utils.multi_objective.box_decompositions.non_dominated import NondominatedPartitioning
  from botorch.utils.testing import BotorchTestCase, MockModel, MockPosterior
  from torch import Tensor
label_desc: Use image node_id 2 for calling the DummyPosteriorTransform obj's underlying member method code with example usage: obj.forward(posterior) without return types