#vulnerable code 
                                @Test
    public void priceFormat() {
        assertEquals("%7.2f    ", INSTRUMENTS.get("FOO").getPriceFormat());
    } 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void priceFormat() {
        assertEquals("%7.2f    ", FRACTIONS.get("FOO").getPriceFormat());
    }