code: def save_train_snapshot():
      callback = _get_callback("save_train_snapshot")
      if callback:
          callback.save_train_snapshot()
  
file_path: nnabla/python/src/nnabla/utils/callback.py
imports: from nnabla.config import nnabla_config
  import importlib
label_desc: Use image node_id 6 for calling a global function with example usage: save_train_snapshot() without return types