algoliasearch/src/offline/java/com/algolia/search/saas/OfflineIndex.java
public Request getObjectsAsync(final @NonNull List<String> objectIDs, @NonNull CompletionHandler completionHandler) {
        return getClient().new AsyncTaskRequest(completionHandler) {
            @NonNull
            @Override
            protected JSONObject run() throws AlgoliaException {
                return getObjectsSync(objectIDs, null);
            }
        }.start();
    }
public Request getObjectsAsync(final @NonNull List<String> objectIDs, @NonNull CompletionHandler completionHandler) {
        return getClient().new AsyncTaskRequest(completionHandler) {
            @NonNull
            @Override
            protected JSONObject run() throws AlgoliaException {
                return getObjectsSync(objectIDs, null);
            }
        }.start();
    }
Get several objects from this index (asynchronously).

@param objectIDs Identifiers of objects to retrieve.
@param completionHandler The listener that will be notified of the request's outcome.
@return A cancellable request.