declare module 'ember-testing/lib/ext/application' {
    import type Application from "@ember/application";
    export interface TestableApp extends Application {
        testing?: boolean;
        testHelpers: Record<string, (...args: unknown[]) => unknown>;
        originalMethods: Record<string, (...args: unknown[]) => unknown>;
        setupForTesting(): void;
        helperContainer: object | null;
        injectTestHelpers(helperContainer: unknown): void;
        removeTestHelpers(): void;
    }
}