### Querying The A&AI
Once your service has a client instance, it can query the _Active & Available Inventory_ by specifying an HTTP endpoint, headers, and the expected response format:
- MultivaluedMap<String, String> headers = new MultivaluedMapImpl();
+ MultivaluedMap<String, String> headers = new MultivaluedHashMap<>();
headers.put("Accept", Arrays.asList(new String[]{"application/json"}));
headers.put("X-FromAppId", Arrays.asList(new String[]{"APP-ID"}));
headers.put("X-TransactionId", Arrays.asList(new String[]{UUID.randomUUID().toString()}));