api/java/src/main/java/com/navercorp/redis/cluster/spring/AbstractOperations.java
<T> T execute(RedisCallback<T> callback, boolean b) {
        return template.execute(callback, b);
    }
<T> T execute(RedisCallback<T> callback, boolean b) {
        return template.execute(callback, b);
    }
Execute.

@param <T>      the generic type
@param callback the callback
@param b        the b
@return the t