text: """Module initialization for gt4sd."""
  from ..extras import EXTRAS_ENABLED
  from .conditional_generation.guacamol.core import (  # noqa: F401
      AaeGenerator,
      GraphGAGenerator,
      GraphMCTSGenerator,
      OrganGenerator,
      SMILESGAGenerator,
      SMILESLSTMHCGenerator,
      SMILESLSTMPPOGenerator,
      VaeGenerator,
  )
  from .conditional_generation.key_bert.core import KeyBERTGenerator  # noqa: F401
  
  # here we import the applications to register them
  from .conditional_generation.paccmann_rl.core import (  # noqa: F401
      PaccMannRLOmicBasedGenerator,
      PaccMannRLProteinBasedGenerator,
  )
  from .conditional_generation.regression_transformer.core import (
      RegressionTransformerMolecules,
      RegressionTransformerProteins,
  )
  from .conditional_generation.reinvent.core import ReinventGenerator  # noqa: F401
  from .conditional_generation.template.core import TemplateGenerator  # noqa: F401
  from .controlled_sampling.advanced_manufacturing.core import (  # noqa: F401
      CatalystGenerator,
  )
  from .controlled_sampling.paccmann_gp.core import PaccMannGPGenerator  # noqa: F401
  from .generation.hugging_face.core import (  # noqa: F401
      HuggingFaceCTRLGenerator,
      HuggingFaceGPT2Generator,
      HuggingFaceOpenAIGPTGenerator,
      HuggingFaceTransfoXLGenerator,
      HuggingFaceXLMGenerator,
      HuggingFaceXLNetGenerator,
  )
  from .generation.pgt.core import (  # noqa: F401
      PGTCoherenceChecker,
      PGTEditor,
      PGTGenerator,
  )
  from .generation.polymer_blocks.core import PolymerBlocksGenerator  # noqa: F401
  from .generation.torchdrug.core import TorchDrugGCPN, TorchDrugGraphAF  # noqa: F401
  from .prediction.paccmann.core import PaccMann  # noqa: F401
  from .prediction.topics_zero_shot.core import TopicsPredictor  # noqa: F401
  
  # extras requirements
  if EXTRAS_ENABLED:
      from .controlled_sampling.class_controlled_sampling.core import (  # noqa: F401
          PAG,
          CogMol,
      )
      from .generation.molgx.core import MolGXQM9Generator  # noqa: F401
  