docs: @Override
  	public boolean containsPrefixBlock(int prefixLength) {
  		checkSubnet(this, prefixLength);
  		int divisionCount = getDivisionCount();
  		int prevBitCount = 0;
  		for(int i = 0; i < divisionCount; i++) {
  			AddressDivision division = getDivision(i);
  			int bitCount = division.getBitCount();
  			int totalBitCount = bitCount + prevBitCount;
  			if(prefixLength < totalBitCount) {
  				int divPrefixLen = Math.max(0, prefixLength - prevBitCount);
  				if(!division.isPrefixBlock(division.getDivisionValue(), division.getUpperDivisionValue(), divPrefixLen)) {
  					return false;
  				}
  				for(++i; i < divisionCount; i++) {
  					division = getDivision(i);
  					if(!division.isFullRange()) {
  						return false;
  					}
  				}
  				return true;
  			}
  			prevBitCount = totalBitCount;
  		}
  		return true;
  	}