presto-main/src/main/java/io/prestosql/operator/HttpPageBufferClient.java/HttpPageBufferClient/createEmptyPagesResponse
class HttpPageBufferClient:        public static PagesResponse createEmptyPagesResponse(String taskInstanceId, long token, long nextToken, boolean complete)
        {
            return new PagesResponse(taskInstanceId, token, nextToken, ImmutableList.of(), complete);
        }