docs: function cliFinish(cmdutil, client) {
      assert.object(client, 'client');
      assert.optionalObject(client.collector, 'client.collector');
  
      if (client.collector) {
          client.collector.collect(artedi.FMT_PROM,
              function _outputMetrics(err, metrics) {
                  if (err) {
                      cmdutil.fail(err);
                      return;
                  }
                  console.error('[artedi metrics]');
                  console.error(metrics);
              });
      }
  }