code: boolean insertToBucket(long bucketIndex, long tag) {
  
  		for (int i = 0; i < CuckooFilter.BUCKET_SIZE; i++) {
  			if (checkTag(bucketIndex, i, 0)) {
  				writeTagNoClear(bucketIndex, i, tag);
  				return true;
  			}
  		}
  		return false;
  	}
docs: inserts a tag into an empty position in the chosen bucket.
  
  @param bucketIndex
  index
  @param tag
  tag
  @return true if insert succeeded(bucket not full)