class_docstr: Simple uni-modal output model. 
code: def forward(self, x: torch.Tensor):
      return self.fc1(x)
  
imports: from typing import List
  import numpy
  import pytest
  import torch
  import torch.nn
  import torch.optim
  from torch.utils.data import DataLoader, TensorDataset
  from alibi.models.pytorch.metrics import AccuracyMetric, LossContainer
  from alibi.models.pytorch.model import Model
label_desc: Use image node_id 2 for calling the UnimodalModel obj's underlying member method code with example usage: obj.forward(x) and returns: self