helper for shared prefs - java version - Refactoring step 1

PreferenceHelper.java

    private static void edit(Context context, Performer<SharedPreferences.Editor> performer) {
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        performer.performOperation(editor);
        editor.apply();
    }

    public interface Performer<T> {
        void performOperation(T victim);
    }