qbit/consul-client/src/main/java/io/advantageous/consul/endpoints/AgentEndpoint.java
public void checkTtl(String serviceId, Status status, String note) {
        check("service:" + serviceId, status, note);
    }
public void checkTtl(String serviceId, Status status, String note) {
        check("service:" + serviceId, status, note);
    }
Prepends the default TTL prefix to the serviceId to produce a check id,
then delegates to check(String checkId, State state, String note)
This method only works with TTL checks that have not been given a custom
name.

@param serviceId service id
@param status    state
@param note      note