code: def forward(self, x):
      # use 'x * F.sigmoid(x)' replace 'silu'
      x = self.bn(self.conv(x))
      y = x * F.sigmoid(x)
      return y
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddle import ParamAttr
  from paddle.regularizer import L2Decay
  from ppdet.core.workspace import register, serializable
  from ppdet.modeling.initializer import conv_init_
  from ..shape_spec import ShapeSpec
label_desc: Use image node_id 3 for calling the BaseConv obj's underlying member method code with example usage: obj.forward(x) and returns: y