api/java/src/main/java/com/navercorp/redis/cluster/spring/DefaultBoundSessionOfHashSetOperations.java
public Long ttl(HK key, HV value) {
        return ops.ttl(getKey(), getField(), key, value);
    }
public Long ttl(HK key, HV value) {
        return ops.ttl(getKey(), getField(), key, value);
    }
/*
@see BoundSessionOfHashSetOperations#ttl(java.lang.Object, java.lang.Object)