class_docstr: Image to Patch Embedding
class_docstr_tok: ["Image","to","Patch","Embedding"]
code: def forward(self, x):
      x = self.proj(x).flatten(2).transpose(1, 2)
      return x
  
imports: import copy
  import logging
  import math
  import torch
  import torch.nn
  from vissl.models.model_helpers import DropPath, to_2tuple, trunc_normal_
  from vissl.models.trunks import register_model_trunk
  from vissl.utils.hydra_config import AttrDict
label_desc: Use image node_id 2 for calling the PatchEmbed obj's underlying member method code with example usage: obj.forward(x) and returns: x