presto-raptor-legacy/src/main/java/io/prestosql/plugin/raptor/legacy/util/PrioritizedFifoExecutor.java/FifoRunnableTask/FifoRunnableTask
class FifoRunnableTask:        public FifoRunnableTask(T task, long sequenceNumber, Comparator<T> taskComparator)
        {
            super(requireNonNull(task, "task is null"), null);
            this.task = task;
            this.sequenceNumber = sequenceNumber;
            this.taskComparator = requireNonNull(taskComparator, "taskComparator is null");
        }