Contextually type object assignments to inherited member #5181

declare module Backbone {
    interface RoutesHash {
        [routePattern: string]: string | {(...urlParts: string[]): void};
    }
    class Events { }
    class Router extends Events {
        routes: RoutesHash;
    }
}

declare module Marionette {
    class AppRouter extends Backbone.Router {
    }
}

module Backbone.Tests {
    // Error, routes is not contextually typed
    class MyRouter extends Backbone.Router {
        routes = {
            "some/route": "someMethod",
            "some/otherRoute": () => {}
        };
    }
}

module Marionette.Tests {
    // Error, routes is not contextually typed
    class MyRouter extends Marionette.AppRouter {
        routes = {
            "some/route": "someMethod",
            "some/otherRoute": () => {}
        };
    }
}