message: add lazy method for telemetryinitializer
diff: @@ -50,6 +50,7 @@ var aisdk = window[aiName] || (function (aiConfig) {
  createLazyMethod("start" + trackEvent);
  createLazyMethod("stop" + trackEvent);
  + createLazyMethod("addTelemetryInitializer");
  createLazyMethod("setAuthenticatedUserContext");
  createLazyMethod("clearAuthenticatedUserContext");
  createLazyMethod("flush");
  