code: def forward(self, x):
      x = self.conv3x3(x)
      attention = self.channel_attention(x)
      x = x * attention
      return x
  
imports: import torch
  import torch.nn
  import torch.nn.functional
  from pywick.models.segmentation.da_basenets.resnet import resnet18
label_desc: Use image node_id 2 for calling the AttentionRefinmentModule obj's underlying member method code with example usage: obj.forward(x) and returns: x