#vulnerable code 
                                @Test
    public void priceFractionDigits() {
        assertEquals(2, INSTRUMENTS.get("FOO").getPriceFractionDigits());
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void priceFractionDigits() {
        assertEquals(2, FRACTIONS.get("FOO").getPriceFractionDigits());
    }