public Request deleteObjectAsync(final @NonNull String objectID, @Nullable CompletionHandler completionHandler) {
        return deleteObjectAsync(objectID, /* requestOptions: */ null, completionHandler);
    }
public Request deleteObjectAsync(final @NonNull String objectID, @Nullable CompletionHandler completionHandler) {
        return deleteObjectAsync(objectID,  null, completionHandler);
    }
public Request deleteObjectAsync ( final @ NonNull String objectID , @ Nullable CompletionHandler completionHandler ) { return deleteObjectAsync ( objectID , /* requestOptions: */ null , completionHandler ) ; }
Deletes an object from this index (asynchronously).

@param objectID          Identifier of the object to delete.
@param completionHandler The listener that will be notified of the request's outcome.
@return A cancellable request.
Deletes an object from this index ( asynchronously ) .