code: def forward(self, posterior):
      return PosteriorList(
          *[
              DeterministicPosterior(2 * p.mean + 1)
              for p in posterior.posteriors
          ]
      )
  
imports: from unittest.mock import patch
  import torch
  from botorch.acquisition.objective import PosteriorTransform
  from botorch.exceptions.errors import InputDataError
  from botorch.models.deterministic import GenericDeterministicModel
  from botorch.models.model import Model, ModelDict, ModelList
  from botorch.models.utils import parse_training_data
  from botorch.posteriors.deterministic import DeterministicPosterior
  from botorch.posteriors.posterior_list import PosteriorList
  from botorch.utils.testing import BotorchTestCase, MockModel, MockPosterior
label_desc: Use image node_id 2 for calling the DummyPosteriorTransform obj's underlying member method code with example usage: obj.forward(posterior) and returns: PosteriorList