code: def loss_fn(self, pos_scores, neg_scores):
      raise NotImplementedError()
  
file_path: euler/examples/TransX/transX.py
imports: import tensorflow
  import tf_euler
  import collections
label_desc: Use image node_id 9 for calling the TransX obj's underlying member method code with example usage: obj.loss_fn(pos_scores, neg_scores) without return types