code: def example_train_sample(self):
      return {
          DataKeys.INPUT: torch.rand(3, 224, 224),
          DataKeys.TARGET: 1,
      }
  
imports: from typing import Any
  from unittest.mock import patch
  import pytest
  import torch
  from flash import Trainer
  from flash.core.data.io.input import DataKeys
  from flash.core.utilities.imports import _TOPIC_IMAGE_AVAILABLE, _TOPIC_SERVE_AVAILABLE
  from flash.image import ImageClassifier
  from torch import Tensor
  from tests.helpers.task_tester import TaskTester
label_desc: Use image node_id 2 for calling the TestImageClassifier obj's underlying member method code with example usage: obj.example_train_sample() and returns: dict