class_docstr: block for unwrapped Resnet
class_docstr_tok: ["block","for","unwrapped","Resnet"]
code: def forward(self, x, x_skip):
      if x_skip is not None:
          x = ME.cat(x, x_skip)
      out_s = self.conv(x)
      if self.final is None:
          out_s = self.norm(out_s)
          out = self.block(out_s)
          return out
      else:
          out_s = MEF.relu(out_s)
          out = self.final(out_s)
          return out
  
imports: import torch
  import MinkowskiEngine
  import MinkowskiEngine.MinkowskiFunctional
  from .common import get_norm
  from .res16unet import get_block
  from .common import NormType
label_desc: Use image node_id 2 for calling the Res2BlockUp obj's underlying member method code with example usage: obj.forward(x, x_skip) and returns: out, out