### Question:
RedisSequenceCounter implements SequenceCounter { @Override public long increBy(long delta) { Long increment = valueOperations.increment(counterKey, delta); if (increment != null) { return increment; } return 0L; } RedisSequenceCounter(String counterKey); @Override void set(long value); @Override Long get(); @Override long incrementAndGet(); @Override long increBy(long delta);  }### Answer:
@Test public void increBy() { }