docs: public int getAndIncrement (K key, int defaultValue, int increment) {
  		int hashCode = key.hashCode();
  		int index = hashCode & mask;
  		if (!key.equals(keyTable[index])) {
  			index = hash2(hashCode);
  			if (!key.equals(keyTable[index])) {
  				index = hash3(hashCode);
  				if (!key.equals(keyTable[index])) return getAndIncrementStash(key, defaultValue, increment);
  			}
  		}
  		int value = valueTable[index];
  		valueTable[index] = value + increment;
  		return value;
  	}