code: def linear_model_creator(config):
      """Returns a torch.nn.Module object."""
      return nn.Linear(
          config.get("input_dim", 1), config.get("output_dim", 1)
      )
  
imports: from bigdl.orca.test_zoo_utils import ZooTestCase
  from bigdl.orca.automl.search import SearchEngineFactory
  from bigdl.orca.automl.search.ray_tune import RayTuneSearchEngine
  from bigdl.orca.automl.model.base_pytorch_model import PytorchModelBuilder
  import torch
  import torch.nn
  from bigdl.orca.automl import hp
  import numpy
  from bigdl.orca import init_orca_context, stop_orca_context
label_desc: Use image node_id 3 for calling a global function with example usage: linear_model_creator(config) and returns: nn