private void set(Object o, Object v) {
			String _o = String.valueOf(o), _v = String.valueOf(v);
			if (!_o.equals("msgid")) {
				if (!_v.startsWith("{"))
					_v = "\"" + _v + "\"";
			}
			_o = "\"" + _o + "\"";
			sb.append(_o + ": " + _v + ", ");
		}