code: def l1(x, y):
      return torch.abs(x - y)
  
file_path: compvis-stable-diffusion/ldm/modules/losses/vqperceptual.py
imports: import torch
  from torch import nn
  import torch.nn.functional
  from einops import repeat
  from taming.modules.discriminator.model import NLayerDiscriminator, weights_init
  from taming.modules.losses.lpips import LPIPS
  from taming.modules.losses.vqperceptual import hinge_d_loss, vanilla_d_loss
label_desc: Use image node_id 4 for calling a global function with example usage: l1(x, y) and returns: torch