class_docstr: This class defines the dilated convolution.
class_docstr_tok: ["This","class","defines","the","dilated","convolution","."]
code: def forward(self, input):
      if self.resolution_down:
          input = self.down_res(input)
      output = self.conv(input)
  
      output = self.act_conv1x1(output)
      if self.resolution_down:
          output = self.up_res(output)
      return self.bn(output)
  
imports: import paddle
  import paddle.nn
  import paddle.nn.functional
  from paddleseg.models import layers
  from paddleseg.cvlibs import manager
  from paddleseg.utils import utils
label_desc: Use image node_id 2 for calling the S2block obj's underlying member method code with example usage: obj.forward(input) and returns: self