public T get() {
        if (queue.isEmpty()) {
            return newInstance();
        }
        T t = queue.relaxedPoll();
        return t == null
                ? newInstance()
                : t;
    }
Note that if the user forgets to recycle a value, though it is a bug, it is okay because JVM GC
will release it finally

@author James Chen
turms-server-common/src/main/java/im/turms/server/common/infra/recycler/Recycler.java