#fixed code
                             @Override
	public void render(Req req, Object value, OutputStream out) throws Exception {
		Customization.of(req).objectMapper().writeValue(out, value);
	}
#vulnerable code 
                             @Override
	public void render(Req req, Object value, OutputStream out) throws Exception {
		Customization.of(req).jackson().writeValue(out, value);
	} 
                            #location 3 
                            #vulnerability type NULL_DEREFERENCE