public Request deleteByQueryAsync(@NonNull Query query, @Nullable CompletionHandler completionHandler) {
        return deleteByQueryAsync(query, /* requestOptions: */ null, completionHandler);
    }
public Request deleteByQueryAsync(@NonNull Query query, @Nullable CompletionHandler completionHandler) {
        return deleteByQueryAsync(query,  null, completionHandler);
    }
public Request deleteByQueryAsync ( @ NonNull Query query , @ Nullable CompletionHandler completionHandler ) { return deleteByQueryAsync ( query , /* requestOptions: */ null , completionHandler ) ; }
Deletes all objects matching a query (helper) using browse and deleteObjects.

@param query             The query that objects to delete must match.
@param completionHandler The listener that will be notified of the request's outcome.
@return A cancellable request.
@deprecated use {@link Index#deleteByAsync(Query, CompletionHandler)} instead.
Deletes all objects matching a query ( helper ) using browse and deleteObjects .