public Optional<String> getStartupCommand() {
        return Optional.of("PRELOAD=" + getPreLoad() + " exec ${VESPA_HOME}/libexec/vespa/vespa-wrapper vespa-start-container-daemon " + getJvmOptions() + " ");
    }
@return the actual search port
TODO: Remove. Use {@link #getPortsMeta()} and check tags in conjunction with {@link #getRelativePort(int)}.
config-model/src/main/java/com/yahoo/vespa/model/container/Container.java