presto-main/src/main/java/io/prestosql/execution/buffer/ClientBuffer.java/ClientBuffer/PendingRead
class ClientBuffer:        private PendingRead(String taskInstanceId, long sequenceId, DataSize maxSize)
        {
            this.taskInstanceId = requireNonNull(taskInstanceId, "taskInstanceId is null");
            this.sequenceId = sequenceId;
            this.maxSize = maxSize;
        }