code: def decodes(self, x: t.Any):
      return 2 * x
  
imports: from __future__ import annotations
  import os
  import re
  import typing
  import numpy
  import pytest
  import torch
  import torch.nn
  import torch.nn.functional
  from fastai.data.block import DataBlock
  from fastai.data.core import DataLoaders
  from fastai.data.core import Datasets
  from fastai.data.core import Module
  from fastai.data.core import TfmdDL
  from fastai.data.transforms import Transform
  from fastai.learner import Learner
  from fastai.test_utils import synth_learner
  from fastcore.foundation import L
  import bentoml
  from bentoml.exceptions import BentoMLException
  from bentoml.exceptions import InvalidArgument
label_desc: Use image node_id 3 for calling the _FakeLossFunc obj's underlying member method code with example usage: obj.decodes(x) and returns: unknown