code: def forward(self, x):
      x = x + self.pos_embed(x)
      x = x + self.drop_path(
          self.conv2(self.attn(self.conv1(self.norm1(x))))
      )
      x = x + self.drop_path(self.mlp(self.norm2(x)))
      return x
  
imports: from collections import OrderedDict
  import math
  from functools import partial
  import torch
  import torch.nn
  import torch.nn.functional
  import torch.utils.checkpoint
  import numpy
  from timm.models.layers import DropPath, to_2tuple, trunc_normal_
  from annotator.uniformer.mmcv_custom import load_checkpoint
  from annotator.uniformer.mmseg.utils import get_root_logger
  from ..builder import BACKBONES
label_desc: Use image node_id 2 for calling the CBlock obj's underlying member method code with example usage: obj.forward(x) and returns: x