switch arg := arg.(type) {
			case string:
				tx.Statement.Selects = append(tx.Statement.Selects, arg)
			case []string:
				tx.Statement.Selects = append(tx.Statement.Selects, arg...)
			default:
				tx.AddError(fmt.Errorf("unsupported select args %v %v", query, args))
				return
			}
		}

		if clause, ok := tx.Statement.Clauses["SELECT"]; ok {
			clause.Expression = nil
			tx.Statement.Clauses["SELECT"] = clause

			bugLogIf(ctx, stream.AddError(err.Error()))
			return
		}
		encStream, err := stream.AddEncryptedStream("inspect.zip", nil)
		if err != nil {
			bugLogIf(ctx, stream.AddError(err.Error()))
			return
		}
		addErr = func(msg string) {
			inspectZipW.Close()
			encStream.Close()
			stream.AddError(msg)
		}
		defer encStream.Close()

     * This method is thread-safe and can be called from multiple crawler threads.
     *
     * @param msg the error message to add; ignored if null or blank
     */
    public static void addError(final String msg) {
        if (StringUtil.isNotBlank(msg)) {
            errors.offer(msg);
        }
    }

    /**
     * Command-line options container for the crawler application.

        Settings settings = new Settings();
        Mirror mirror = new Mirror();
        mirror.setId("local");
        settings.addMirror(mirror);
        mirror = new Mirror();
        mirror.setId("illegal\\:/chars");
        mirror.setUrl("http://void");
        mirror.setMirrorOf("void");
        settings.addMirror(mirror);

        SimpleProblemCollector problems = new SimpleProblemCollector();
        validator.validate(settings, problems);

        //   </mirror>
        // </mirrors>

        for (Mirror mirror : settings.getMirrors()) {
            mirror = mirror.clone();

            request.addMirror(mirror);
        }

        request.setActiveProfiles(settings.getActiveProfiles());

        for (org.apache.maven.settings.Profile rawProfile : settings.getProfiles()) {

        //     <url>http://repository.sonatype.org/content/groups/public</url>
        //   </mirror>
        // </mirrors>

        for (Mirror mirror : settings.getMirrors()) {
            request.addMirror(mirror);
        }

        for (Repository remoteRepository : settings.getRepositories()) {
            try {

    MavenExecutionRequest addServer(Server server);

    // Mirrors
    List<Mirror> getMirrors();

    MavenExecutionRequest setMirrors(List<Mirror> mirrors);

    MavenExecutionRequest addMirror(Mirror mirror);

    // Plugin groups
    List<String> getPluginGroups();

    MavenExecutionRequest setPluginGroups(List<String> pluginGroups);

    MavenExecutionRequest addPluginGroup(String pluginGroup);

            this.mirrors = new ArrayList<>(mirrors);
        } else {
            this.mirrors = null;
        }

        return this;
    }

    @Override
    public MavenExecutionRequest addMirror(Mirror mirror) {
        Objects.requireNonNull(mirror, "mirror cannot be null");

        for (Mirror p : getMirrors()) {
            if (p.getId() != null && p.getId().equals(mirror.getId())) {

        //     <url>http://repository.sonatype.org/content/groups/public</url>
        //   </mirror>
        // </mirrors>

        for (Mirror mirror : settings.getMirrors()) {
            request.addMirror(new org.apache.maven.settings.Mirror(mirror));
        }

        // Collect repositories; are sensitive to ordering
        LinkedHashMap<String, Repository> remoteRepositories = new LinkedHashMap<>();

pkg net, func ResolveUnixAddr(string, string) (*UnixAddr, error)
pkg net, func SplitHostPort(string) (string, string, error)
pkg net, method (*AddrError) Error() string
pkg net, method (*AddrError) Temporary() bool
pkg net, method (*AddrError) Timeout() bool
pkg net, method (*DNSConfigError) Error() string
pkg net, method (*DNSConfigError) Temporary() bool
pkg net, method (*DNSConfigError) Timeout() bool