code: def forward(self, x):
      for cel, transformer in self.layers:
          x = cel(x)
          x = transformer(x)
  
      return self.to_logits(x)
  
imports: import torch
  from torch import nn, einsum
  from einops import rearrange
  from einops.layers.torch import Rearrange, Reduce
  import torch.nn.functional
label_desc: Use image node_id 2 for calling the CrossFormer obj's underlying member method code with example usage: obj.forward(x) and returns: self