code: def forward(self, fmap):
      p = self.patch_size
      fmap = rearrange(
          fmap, "b c (h p1) (w p2) -> b (c p1 p2) h w", p1=p, p2=p
      )
      return self.proj(fmap)
  
imports: import torch
  from torch import nn, einsum
  import torch.nn.functional
  from einops import rearrange, repeat
  from einops.layers.torch import Rearrange
label_desc: Use image node_id 2 for calling the PatchEmbedding obj's underlying member method code with example usage: obj.forward(fmap) and returns: self