class_docstr: Configuration class.
  
  This class is responsible for loading, saving, and storing PennyLane
  and plugin/device configurations.
  
  Args:
      name (str): filename of the configuration file.
          This should be a valid TOML file. You may also pass an absolute
          or a relative file path to the configuration file.
docstr: Save a configuration file.
  
  Args:
      filepath (str): path to the configuration file.
docstr_tok: ["Save","a","configuration","file",".","Args",":","filepath","(","str",")",":","path","to","the","configuration","file","."]
code: def save(self, filepath):
      """Save a configuration file.
  
      Args:
          filepath (str): path to the configuration file.
      """
      with open(filepath, "w", encoding="utf8") as f:
          toml.dump(self._config, f)
  
file_path: pennylane/pennylane/configuration.py
imports: import contextlib
  import os
  import toml
  from appdirs import user_config_dir
label_desc: Use image node_id 6 for calling the Configuration obj's underlying member method code with example usage: obj.save(filepath) without return types