code: def on_forward_start(self, inputs):
      return inputs
  
file_path: BigDL/python/nano/src/bigdl/nano/deps/ipex/ipex_quantization_model.py
imports: from collections.abc import Sequence
  import intel_extension_for_pytorch
  from intel_extension_for_pytorch.quantization import prepare, convert
  from bigdl.nano.pytorch.model import AcceleratedLightningModule
  from bigdl.nano.pytorch.context_manager import generate_context_manager
  from bigdl.nano.utils.pytorch import patch_attrs_from_model_to_object, jit_convert
  from bigdl.nano.utils.common import compare_version
  import operator
  import torch
label_desc: Use image node_id 3 for calling the PytorchIPEXQuantizationModel obj's underlying member method code with example usage: obj.on_forward_start(inputs) and returns: inputs