code: @Override
  	public String toFullString() {
  		String result;
  		if(hasNoStringCache() || (result = stringCache.fullString) == null) {
  			stringCache.fullString = result = toNormalizedString(IPv4StringCache.fullParams);
  		}
  		return result;
  	}
docs: This produces a string with no compressed segments and all segments of full length,
  which is 3 characters for IPv4 segments.