class_docstr: Deformable Transformer Decoder layer used in Deformable DETR.
  
  Described in: https://arxiv.org/abs/2010.04159.
class_docstr_tok: ["Deformable","Transformer","Decoder","layer","used","in","Deformable","DETR",".","Described","in",":","https",":","\/\/arxiv.org\/abs\/2010.04159","."]
code: def _ffn(self, x: Tensor) -> Tensor:
      return self.linear2(
          self.dropout3(self.activation(self.linear1(x)))
      )
  
imports: from __future__ import annotations
  from typing import Optional
  import torch
  from torch import nn
  from kornia.contrib.models.common import MLP, ConvNormAct
  from kornia.core import Module, Tensor, concatenate
label_desc: Use image node_id 2 for calling the TransformerDecoderLayer obj's underlying member method code with example usage: obj._ffn(x) and returns: self