code: def forward(self, x):
      if self.transposed:
          x = rearrange(x, "... h (l s) -> ... (h s) l", s=self.stride)
      else:
          x = rearrange(x, "... (l s) h -> ... l (h s)", s=self.stride)
      x = self.linear(x)
      return x, None
  
imports: import torch
  import torch.nn.functional
  from einops import rearrange, reduce, repeat
  from torch import nn
  from espnet2.asr.state_spaces.base import SequenceModule
  from espnet2.asr.state_spaces.components import LinearActivation
label_desc: Use image node_id 2 for calling the DownPool obj's underlying member method code with example usage: obj.forward(x) and returns: x,  None