code: def quantile_loss(self):
      return self.motion_entropy_bottleneck.loss()
  
imports: from typing import Callable, NamedTuple, Optional
  import torch
  import torch.nn
  from torch import Tensor
  import neuralcompression.functional
label_desc: Use image node_id 4 for calling the DvcStage2 obj's underlying member method code with example usage: obj.quantile_loss() and returns: self