How to check which all API's will be Unavailable during the AEM upgrade

Statement: Detects all the package imports that will be unsatisfied when upgrading to a specified AEM version.

Solution:
Go to this URL: http://localhost:4502/system/console/jmx/com.adobe.aem.upgrade.prechecks%3Atype%3DPreUpgradeTasks

Click on detectUsageOfUnavailableAPI() method
Key in the Version of AEM planning to upgrade ex. AEM 6.4
Click on Invoke as shown in below screenshot.

It will show the list of API will be unavailable for higher version upgrade