algoliasearch/src/main/java/com/algolia/search/saas/Index.java
public Request addObjectAsync(final @NonNull JSONObject object, final @NonNull String objectID, @Nullable CompletionHandler completionHandler) {
        return addObjectAsync(object, objectID, /* requestOptions: */ null, completionHandler);
    }
public Request addObjectAsync(final @NonNull JSONObject object, final @NonNull String objectID, @Nullable CompletionHandler completionHandler) {
        return addObjectAsync(object, objectID, /* requestOptions: */ null, completionHandler);
    }
Adds an object to this index, assigning it the specified object ID (asynchronously).
If an object already exists with the same object ID, the existing object will be overwritten.
<p>
WARNING: For performance reasons, the arguments are not cloned. Since the method is executed in the background,
you should not modify the object after it has been passed.
</p>

@param object            The object to add.
@param objectID          Identifier that you want to assign this object.
@param completionHandler The listener that will be notified of the request's outcome.
@return A cancellable request.