docs: protected void introspect(ObjectName objectName, QueryExp query, PrintWriter writer) {
          // Iterate over the mbean servers, query for the beans, introspect
          for (MBeanServer mbeanServer : getMBeanServers()) {
              for (ObjectName mbean : mbeanServer.queryNames(objectName, query)) {
                  introspectMBeanAttributes(mbeanServer, mbean, writer);
              }
          }
      }