docs: function exposeSwaggerUi(path, options) {
    if (typeof path !== 'string') {
      options = path;
      path = null;
    }
    options = options || {};
    var swaggerDoc = options.swaggerDoc;  delete options.swaggerDoc;
  
    if (!this.__swaggerDocURL) {
      this.exposeSwagger(swaggerDoc || '', options);
    };
  
    var uiPath = _path.join(__dirname, '../swagger-ui');
    this.__swaggerUiStaticMiddleware = serveStatic(uiPath, {});
  
    this.__swaggerUiPath = path || '/swagger-ui';
    this.use(this.__swaggerUiPath, swaggerUi.bind(this));
  
    return this;
  }