presto-main/src/main/java/io/prestosql/execution/SqlTaskManager.java/SqlTaskManager/acknowledgeTaskResults
class SqlTaskManager:    @Override
    public void acknowledgeTaskResults(TaskId taskId, OutputBufferId bufferId, long sequenceId)
    {
        requireNonNull(taskId, "taskId is null");
        requireNonNull(bufferId, "bufferId is null");
        checkArgument(sequenceId >= 0, "sequenceId is negative");

        tasks.getUnchecked(taskId).acknowledgeTaskResults(bufferId, sequenceId);
    }