presto-verifier/src/main/java/io/prestosql/verifier/Verifier.java/Verifier/Verifier
class Verifier:    public Verifier(PrintStream out, VerifierConfig config, Set<EventClient> eventClients)
    {
        requireNonNull(out, "out is null");
        this.config = requireNonNull(config, "config is null");
        this.eventClients = requireNonNull(eventClients, "eventClients is null");
        this.whitelist = requireNonNull(config.getWhitelist(), "whitelist is null");
        this.blacklist = requireNonNull(config.getBlacklist(), "blacklist is null");
        this.threadCount = config.getThreadCount();
        this.precision = config.getDoublePrecision();
    }