code: def _sub_loss_names(self):
      return ["pos_loss", "neg_loss"]
  
file_path: pytorch-metric-learning/src/pytorch_metric_learning/losses/contrastive_loss.py
imports: import torch
  from ..reducers import AvgNonZeroReducer
  from ..utils import loss_and_miner_utils
  from .generic_pair_loss import GenericPairLoss
label_desc: Use image node_id 7 for calling the ContrastiveLoss obj's underlying member method code with example usage: obj._sub_loss_names() and returns: list