api/java/src/main/java/com/navercorp/redis/cluster/spring/AbstractOperations.java
@SuppressWarnings("unchecked")
    byte[] rawKey(Object key) {
        Assert.notNull(key, "non null key required");
        return keySerializer().serialize(key);
    }
@SuppressWarnings("unchecked")
    byte[] rawKey(Object key) {
        Assert.notNull(key, "non null key required");
        return keySerializer().serialize(key);
    }
Raw key.

@param key the key
@return the byte[]