title: How to trigger a payload from MetricKit for development and debugging
body: <p>The new <a href="https://developer.apple.com/documentation/metrickit?language=objc" rel="nofollow noreferrer">MetricKit</a> announced at WWDC 2019 allows App developers to retrieve a metrics payload at most once per day. </p>
  
  <p>During development and testing, it would be very helpful to be able to trigger the <a href="https://developer.apple.com/documentation/metrickit/mxmetricmanagersubscriber/3131905-didreceivemetricpayloads?language=objc" rel="nofollow noreferrer">didReceiveMetricPayloads:</a> API. Is that possible? </p>