code: public void registerCheck(String checkId, String name, long ttl) {
          registerCheck(checkId, name, ttl, null);
      }
docs: Registers a Health Check with the Agent.
  
  @param checkId The Check ID to use.  Must be unique for the Agent.
  @param name    The Check Name.
  @param ttl     Time to live for the Consul dead man's switch.