code: public void clear() {
  		modCount++;
  
  		// this does not allocate more memory:
  		//TODO possibly faster: create new empty bucket? -> test speeds create vs set-to-null
  		for (int i = 0; i < bucketSize; i++) {
  			bucket[i] = null;
  		}
  
  		bucketDepth = 0;
  		size = 0;
  	}
docs: Removes all of the elements from this list.  The list will
  be empty after this call returns.