code: def forward(self, x):
      x = self.dw_conv(x)
      x = F.relu6(self.bn(x))
      x = self.pw_conv(x)
      return x
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from ppdet.core.workspace import register
  from paddle.regularizer import L2Decay
  from paddle import ParamAttr
  from ..layers import AnchorGeneratorSSD
  from ..cls_utils import _get_class_default_kwargs
label_desc: Use image node_id 2 for calling the SepConvLayer obj's underlying member method code with example usage: obj.forward(x) and returns: x