code: def _get_neg_loss(self, neg_score):
      return self.loss_criterion(neg_score, self.neg_label)
  
imports: from ..base_loss import *
  from .tensor_models import *
  import torch
  import torch.nn.functional
label_desc: Use image node_id 3 for calling the LossGenerator obj's underlying member method code with example usage: obj._get_neg_loss(neg_score) and returns: self