Where can I find the JavaDoc for ybootstrap.jar, particularly for AbstractEvent

Hybris version: 5.7

I'm looking for the JavaDoc for this class: de.hybris.platform.servicelayer.event.events.AbstractEvent.

It doesn't seem to be part of hybris-commerce-suite-apidoc-5.7.0.zip, or: https://download.hybris.com/api/5.7.0/commercesuite/de/hybris/platform/servicelayer/event/events/package-frame.html

Where can I find it, or does it not exist?