code: def _add_conv_dw(out, dw_channels, channels, stride, relu6=False):
      _add_conv(
          out,
          channels=dw_channels,
          kernel=3,
          stride=stride,
          pad=1,
          num_group=dw_channels,
          relu6=relu6,
      )
      _add_conv(out, channels=channels, relu6=relu6)
  
imports: import os
  from ...None import nn
  from ....device import cpu
  from ...block import HybridBlock
  from ....None import base, np
  from ....util import use_np, wrap_ctx_to_device_func
label_desc: Use image node_id 2 for calling a global function with example usage: _add_conv_dw(out, dw_channels, channels, stride, relu6) without return types