presto-main/src/main/java/io/prestosql/dispatcher/DecoratingListeningExecutorService.java/DecoratingListeningExecutorService/DecoratingListeningExecutorService
class DecoratingListeningExecutorService:    public DecoratingListeningExecutorService(ListeningExecutorService delegate, TaskDecorator decorator)
    {
        this.delegate = requireNonNull(delegate, "delegate is null");
        this.decorator = requireNonNull(decorator, "decorator is null");
    }