Code snippets from toaster launcher part 2

LauncherPresenter.java

    @Override
    public void onLaunch(String coordinates, String power) {
        validateFields(coordinates, power);

        dispatch.execute(resource.launch(coordinates, power), new AsyncCallback<Void>() {
            @Override
            public void onFailure(Throwable throwable) {
                // Handle failure
            }

            @Override
            public void onSuccess(Void aVoid) {
                // Handle success
            }
        });
    }