Unknown type undefined

[linjinze999]

Current behavior Public method: options2 throw error Unknown type undefined

To reproduce

  /**
   * show
   * @public
   * @param options1 options1
   * @param options2 options2
   */
  public show = (options1:{}, options2?: {}) => {
    // pass
  };

Expected behavior

Public method support optional parameters

[linjinze999]

https://github.com/styleguidist/react-styleguidist/blob/master/src/client/rsg-components/Argument/ArgumentRenderer.tsx#L42C2-L42C61 incompatible with https://github.com/styleguidist/react-docgen-typescript/blob/master/src/parser.ts#L555