code: def forward(self, x, *args, **kwargs):
      return self.ff(x), None
  
file_path: espnet/espnet2/asr/state_spaces/ff.py
imports: from functools import partial
  from torch import nn
  from espnet2.asr.state_spaces.base import SequenceModule
  from espnet2.asr.state_spaces.components import DropoutNd, LinearActivation
label_desc: Use image node_id 2 for calling the FF obj's underlying member method code with example usage: obj.forward(x) and returns: self,  None