Get property value from a method in the same class

Question

I've the following class

namespace Cancel {
    export class View {
        controller = new Controller();

        test() {
            this.controller.pr();
        }
    }

    export const view = new View();
}

I call the test method from a button inside a Telerik KendoUI-Grid row and I get the following error

Cannot read property 'pr' of undefined at init.test

This error is shown because this is not pointing to the class so the question is

How can I access to controller's property in the test method?