code: def set_learning_rate(self, lr):
      self._optimizer.set_learning_rate(lr)
  
file_path: insightface/recognition/partial_fc/mxnet/optimizer.py
imports: import horovod.mxnet
  import mxnet
  from mxnet import nd
label_desc: Use image node_id 7 for calling the DistributedOptimizer obj's underlying member method code with example usage: obj.set_learning_rate(lr) without return types