onUnRecoverableConfigFileDiagnostic(x) {
      console.warn('Unrecoverable diagnostic', x)
    }
@typedef MetaOptions
  Configuration.
@property {ReadonlyArray<string> | null | undefined} [include]
  List of keys to include (optional).
@property {ReadonlyArray<string> | null | undefined} [exclude]
  List of keys to exclude (optional).