code: def set_docs():
      _set_docs_backend()
  
      _docs.set_doc(
          chainerx.get_backend,
          """get_backend(backend_name)
  Returns a backend specified by the name.
  
  Args:
      backend_name (str): Backend name.
  
  Returns:
      ~chainerx.Backend: Backend object.
  """,
      )
  
label_desc: Use image node_id 2 for calling a global function with example usage: set_docs() without return types