#vulnerable code 
                             @Test
	public void testDeleteBody() throws JSONException, UnirestException {
		String body = "{\"jsonString\":{\"members\":\"members1\"}}";
		HttpResponse<JsonNode> response = Unirest.delete("http://httpbin.org/delete").body(body).asJson();
		assertEquals(200, response.getStatus());
		assertEquals(body, response.getBody().getObject().getString("data"));
	} 
                            #location 6 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                             @Test
	public void testDeleteBody() throws JSONException, UnirestException {
		String body = "{\"jsonString\":{\"members\":\"members1\"}}";
		HttpResponse<JsonNode> response = Unirest.delete(MockServer.DELETE)
				.body(body)
				.asJson();

		assertEquals(200, response.getStatus());
		parse(response).asserBody(body);
	}