code: def conv_dw(inp, oup, stride, leaky=0.1):
      return nn.Sequential(
          nn.Conv2d(inp, inp, 3, stride, 1, groups=inp, bias=False),
          nn.BatchNorm2d(inp),
          nn.LeakyReLU(negative_slope=leaky, inplace=True),
          nn.Conv2d(inp, oup, 1, 1, 0, bias=False),
          nn.BatchNorm2d(oup),
          nn.LeakyReLU(negative_slope=leaky, inplace=True),
      )
  
file_path: towhee/towhee/models/retina_face/utils.py
imports: from typing import Dict
  from collections import OrderedDict
  import torch
  from torch import nn
label_desc: Use image node_id 4 for calling a global function with example usage: conv_dw(inp, oup, stride, leaky) and returns: nn