class_docstr: Transformer for DRL.
class_docstr_tok: ["Transformer","for","DRL","."]
code: def forward(self, x: torch.Tensor, attn_mask: torch.Tensor):
      return self.resblocks((x, attn_mask))[0]
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import logging
  import torch
  from torch import nn
  from towhee.models.drl.until_module import LayerNorm
  from collections import OrderedDict
label_desc: Use image node_id 2 for calling the Transformer obj's underlying member method code with example usage: obj.forward(x, attn_mask) and returns: self