presto-main/src/main/java/io/prestosql/server/remotetask/SimpleHttpResponseHandler.java/SimpleHttpResponseHandler/SimpleHttpResponseHandler
class SimpleHttpResponseHandler:    public SimpleHttpResponseHandler(SimpleHttpResponseCallback<T> callback, URI uri, RemoteTaskStats stats)
    {
        this.callback = callback;
        this.uri = uri;
        this.stats = requireNonNull(stats, "stats is null");
    }