code: def backend(self, backend):
      self._check_backend(backend)
  
      self._backend = backend
  
file_path: nnabla/python/src/nnabla/utils/audio_utils/backend_manager.py
imports: import importlib
  from collections import OrderedDict
label_desc: Use image node_id 7 for calling the AudioUtilsBackendManager obj's underlying member method code with example usage: obj.backend(backend) without return types