docs: public void writeMBeanQuery(OutputStream out, MBeanQuery value) throws IOException {
          writeStartObject(out);
          writeObjectNameField(out, OM_OBJECTNAME, value.objectName);
          // TODO: Produce proper JSON for QueryExp?
          writeSerializedField(out, OM_QUERYEXP, value.queryExp);
          writeStringField(out, OM_CLASSNAME, value.className);
          writeEndObject(out);
      }