code: def forward(self, x: Tensor) -> Tensor:
      x = self.conv(x)
      if self.use_bn:
          x = self.bn(x)
      return x
  
imports: from __future__ import annotations
  from collections import OrderedDict
  from typing import Optional
  import torch
  import torch.nn.functional
  from torch import nn
  from kornia.core import Module, Tensor, concatenate
  from kornia.core.check import KORNIA_CHECK
  from kornia.utils import map_location_to_cpu
label_desc: Use image node_id 2 for calling the SingleConvBlock obj's underlying member method code with example usage: obj.forward(x) and returns: x