#vulnerable code 
                                @Test
    public void testCreatingHttpSubscriptionXmlMapping() {
        Subscription subscription = Subscription.Subscribe(
                Transport.transport("http").
                        option("context", "/test").
                        option("transport", "http,https"));

        subscription.map(Mapper.mapper("xml").
                map("/h:time").
                map("data", "//h:data").
                option("xmlns:h", "http://www.w3.org/TR/html4/"));

        subscription.insertInto("FooStream");

        ExecutionPlan.executionPlan("test").addSubscription(subscription);

    } 
                            #location 10 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                @Test
    public void testCreatingHttpSubscriptionXmlMapping() {
        Subscription subscription = Subscription.Subscribe(
                Transport.transport("http").
                        option("context", "/test").
                        option("transport", "http,https"));

        subscription.map(Mapping.format("xml").
                map("/h:time").
                map("data", "//h:data").
                option("xmlns:h", "http://www.w3.org/TR/html4/"));

        subscription.insertInto("FooStream");

        ExecutionPlan.executionPlan("test").addSubscription(subscription);

    }