code: public List<UUID> spawn(int nbAgents, Class<? extends Agent> agent, Object... params) {
  		return this.spawnService.spawn(nbAgents, null, this.janusContext, null, agent, params);
  	}
docs: Spawn agents of the given type, and pass the parameters to its initialization function.
  
  @param nbAgents the number of agents to spawn.
  @param agent the type of the agents to spawn.
  @param params the list of the parameters to pass to the agent initialization function.
  @return the identifiers of the agents, never <code>null</code>.