code: def _get_pre_train_config(self, head_num_classes=100):
      config = get_fast_test_task_config(
          head_num_classes=head_num_classes
      )
      config["num_epochs"] = 2
      return config
  
imports: import copy
  import unittest
  from typing import Any, Dict
  from unittest import mock
  import torch
  import torch.nn
  from classy_vision.generic.util import get_checkpoint_dict
  from classy_vision.losses import ClassyLoss, register_loss
  from classy_vision.tasks import build_task, FineTuningTask
  from classy_vision.trainer import LocalTrainer
  from test.generic.config_utils import get_fast_test_task_config
  from test.generic.utils import compare_model_state
  from torch.nn.modules.loss import CrossEntropyLoss
label_desc: Use image node_id 4 for calling the TestFineTuningTask obj's underlying member method code with example usage: obj._get_pre_train_config(head_num_classes) and returns: config