#vulnerable code 
                                public void testAtomicInt() throws Exception
    {
        ObjectMapper mapper = new ObjectMapper();
        AtomicInteger value = mapper.readValue("13", AtomicInteger.class);
        assertEquals(13, value.get());
    } 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public void testAtomicInt() throws Exception
    {
        AtomicInteger value = MAPPER.readValue("13", AtomicInteger.class);
        assertEquals(13, value.get());
    }