api/java/src/main/java/com/navercorp/redis/cluster/spring/DefaultTypedTuple.java
public int compareTo(Double o) {
        Double d = (score == null ? Double.valueOf(0) : score);
        Double a = (o == null ? Double.valueOf(0) : o);
        return d.compareTo(a);
    }
public int compareTo(Double o) {
        Double d = (score == null ? Double.valueOf(0) : score);
        Double a = (o == null ? Double.valueOf(0) : o);
        return d.compareTo(a);
    }
/*
@see java.lang.Comparable#compareTo(java.lang.Object)