docstr: Forward pass
code: def forward(self, x):
      """Forward pass"""
      for ff in self.ff:
          x = ff(x)
      return self.out(x)
  
imports: from turtle import hideturtle
  import pytorch_lightning
  import torch
  import torch.nn.functional
  import torch.nn
  from pytorch_lightning import seed_everything
  from pathlib import Path
  from src.transformer.transformer_utils import *
  from src.transformer.metrics import CorrectedBAcc, CorrectedF1, CorrectedMCC, AUL
  import torchmetrics
label_desc: Use image node_id 2 for calling the NNEncoder obj's underlying member method code with example usage: obj.forward(x) and returns: self