code: public void add(byte b, String s) {
  		if (s != null) {
  			String s2 = get(b);
  			if (s2 == null)
  				s2 = s;
  			else
  				s2 += lineSeparator + s;
  			set(b, s2);
  		}
  	}
docs: Add the string s as new line to field b