How to use the io-functions-commons/dist/src/utils/application_insights.diffInMilliseconds function in io-functions-commons

from: notificationDefaultParams.MAIL_FROM,
    headers: {
      "X-Italia-Messages-MessageId": message.id,
      "X-Italia-Messages-NotificationId": notificationId
    },
    html: documentHtml,
    messageId: message.id,
    subject: content.subject,
    text: bodyText,
    to: emailNotification.toAddress
    // priority: "high", // TODO: set based on kind of notification
    // disableFileAccess: true,
    // disableUrlAccess: true,
  });

  const sendMailCallDurationMs = diffInMilliseconds(startSendMailCallTime);

  const eventName = "notification.email.delivery";

  const eventContent = {
    dependencyTypeName: "HTTP",
    duration: sendMailCallDurationMs,
    name: eventName,
    properties: {
      addressSource: emailNotification.addressSource,
      transport: lMailerTransporter.transporter.name
    }
  };

  if (isLeft(sendResult)) {
    const error = sendResult.value;
    // track the event of failed delivery

)
    );
  }

  const webhookNotification = errorOrWebhookNotification.value.channels.WEBHOOK;

  const startWebhookCallTime = process.hrtime();

  const sendResult = await sendToWebhook(
    webhookNotification.url,
    message,
    content,
    senderMetadata
  );

  const webhookCallDurationMs = diffInMilliseconds(startWebhookCallTime);

  const eventName = "notification.webhook.delivery";

  // hide backend secret token in logs
  const hostName = UrlFromString.decode(webhookNotification.url).fold(
    _ => "invalid url",
    url => url.hostname || "invalid hostname"
  );

  const eventContent = {
    data: hostName,
    dependencyTypeName: "HTTP",
    duration: webhookCallDurationMs,
    name: eventName
  };

);
    }

    // queue the message to the created messages queue by setting
    // the message to the output binding of this function
    // tslint:disable-next-line:no-object-mutation
    context.bindings.createdMessage = createdMessageEventOrError.value;

    //
    // generate appinsights event
    //

    // track the event that a message has been created
    appInsightsClient.trackEvent({
      measurements: {
        duration: diffInMilliseconds(startRequestTime)
      },
      name: appInsightsEventName,
      properties: {
        ...appInsightsEventProps,
        success: "true"
      }
    });

    //
    // respond to request
    //

    // redirect the client to the message resource
    return ResponseSuccessRedirectToResource(
      newMessageWithoutContent,
      `/api/v1/messages/${fiscalCode}/${newMessageWithoutContent.id}`,