use method

void use(
  1. Middleware middleware
)

Registers a middleware to use for all specified routes.

You can not register a Middleware after you registered any route.

Implementation

void use(Middleware middleware) {
  if (_routeAdded) {
    throw ArgumentError(
        'Please use the "use()" method before adding any other routes.');
  }
  _middlewareList.add(middleware);
}