public Request getObjectsAsync(final @NonNull Collection<String> objectIDs, @Nullable CompletionHandler completionHandler) {
        return getObjectsAsync(objectIDs, /* attributesToRetrieve: */ null, /* requestOptions: */ null, completionHandler);
    }
public Request getObjectsAsync(final @NonNull Collection<String> objectIDs, @Nullable CompletionHandler completionHandler) {
        return getObjectsAsync(objectIDs,  null,  null, completionHandler);
    }
public Request getObjectsAsync ( final @ NonNull Collection < String > objectIDs , @ Nullable CompletionHandler completionHandler ) { return getObjectsAsync ( objectIDs , /* attributesToRetrieve: */ null , /* requestOptions: */ null , completionHandler ) ; }
Gets 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.
Gets several objects from this index ( asynchronously ) .