code: def forward(self, logits, label):
      loss = flow._C.sparse_softmax_cross_entropy(logits, label)
      loss = flow.mean(loss)
      return loss
  
file_path: insightface/recognition/arcface_oneflow/utils/losses.py
imports: import oneflow
  from oneflow import nn
label_desc: Use image node_id 2 for calling the CrossEntropyLoss_sbp obj's underlying member method code with example usage: obj.forward(logits, label) and returns: loss