code: def sample(self):
      return torch.tensor([self._x[0]], dtype=self._x_type)
  
imports: import torch
  from lightning.pytorch.core.datamodule import LightningDataModule
  from lightning_utilities.core.imports import RequirementCache
  from torch.utils.data import DataLoader
  from tests_pytorch.helpers.datasets import MNIST, SklearnDataset, TrialMNIST
label_desc: Use image node_id 7 for calling the SklearnDataModule obj's underlying member method code with example usage: obj.sample() and returns: torch