text: Title: How to use on multi-input and multi-output segmentation network?
  Body: if I have a semantic segmentation model:
      input1 : (B, 3, H, W)
      input2 : (B, 3, H, W)
  
      output1, ouput2 = model(input1, input2)
  
      output1 : (B, C, H, W)
      output2 : (B, C, H, W)
  
  Question:
      how can I get the grad-cam for output1-input1, output2-input2, output1-input2 and output2-input1?
  
  Thanks!
  
  
  