class Test {

    void f(String strings) {
        final String[] strings1 = new String[]{"c", "d"};
        final String foo = foo(strings1);
        extract("a", "b", foo);
    }

    private static void extract(final String from, final String to, String anObject)  {

    }

    public String foo(String[] extensions) {
      return null
    }

}
