code: def forward(self, x):
      return rearrange(self.conv_layers(x), "b c h w -> b (h w) c")
  
imports: import torch
  from torch import nn, einsum
  import torch.nn.functional
  from einops import rearrange, repeat
label_desc: Use image node_id 3 for calling the Tokenizer obj's underlying member method code with example usage: obj.forward(x) and returns: rearrange