public MobsimAgent unregisterAdditionalAgentOnLink(Id<Person> agentId, Id<Link> linkId) { if (linkId == null) { // seems that this can happen in tests; not sure if it can happen in regular code. kai, jun'15 return null; } QLinkI qLink = this.network.getNetsimLink(linkId); return qLink.unregisterAdditionalAgentOnLink(agentId); }