code: def forward(self, x):
      x1 = self.lrelu(self.conv1(x))
      x2 = self.lrelu(self.conv2(paddle.concat((x, x1), 1)))
      x3 = self.lrelu(self.conv3(paddle.concat((x, x1, x2), 1)))
      x4 = self.lrelu(self.conv4(paddle.concat((x, x1, x2, x3), 1)))
      x5 = self.conv5(paddle.concat((x, x1, x2, x3, x4), 1))
      return x5 * 0.2 + x
  
imports: import functools
  import paddle
  import paddle.nn
  import paddle.nn.functional
label_desc: Use image node_id 2 for calling the ResidualDenseBlock_5C obj's underlying member method code with example usage: obj.forward(x) and returns: unknown