code: def pairwise_distance(self, query_emb, ref_emb):
      return super().pairwise_distance(query_emb, ref_emb) * -1
  
imports: import copy
  import torch
  from ..distances import LpDistance
  from ..losses import TripletMarginLoss
  from ..miners import EmbeddingsAlreadyPackagedAsTriplets
  from ..utils import common_functions
  from ..utils import loss_and_miner_utils
  from .train_with_classifier import TrainWithClassifier
label_desc: Use image node_id 2 for calling the NegativeLpDistance obj's underlying member method code with example usage: obj.pairwise_distance(query_emb, ref_emb) and returns: unknown