code: def forward(self, input):
      return self.layer2(self.relu(self.layer1(input)))
  
file_path: ray/doc/source/train/doc_code/hvd_trainer.py
imports: import os
  import tempfile
  import horovod.torch
  import ray
  from ray import train
  from ray.train import Checkpoint, ScalingConfig
  import ray.train.torch
  from ray.train.horovod import HorovodTrainer
  import torch
  import torch.nn
label_desc: Use image node_id 2 for calling the NeuralNetwork obj's underlying member method code with example usage: obj.forward(input) and returns: self