@Override
    public Optional<String> getStartupCommand() {
        String startup = "exec $ROOT/sbin/vespa-proton --identity " + getConfigId();
        if (serviceLayerService != null) {
            startup = startup + " --serviceidentity " + serviceLayerService.getConfigId();
        }
        return Optional.of(startup);
    }
Represents a search node (proton).
<p>
Due to the current disconnect between StorageNode and SearchNode, we have to
duplicate the set of RestartConfigs classes from StorageNode here, as SearchNode
runs in a content/storage node context without this being immediately obvious
in the model.

@author arnej27959
@author hmusum
config-model/src/main/java/com/yahoo/vespa/model/search/SearchNode.java