docs: public JSONWriter value(JSONString jss) throws JSONException {
          if (jss == null) {
              valueNull();
              return this;
          }
  
          try {
              String asString = jss.toJSONString();
              if (asString == null) {
                  throw new JSONException("Unexpected null from toJSONString");
              }
              appendValue(asString);
              return this;
          }
          catch (Exception e) {
              throw new JSONException(e);
          }
      }