The "kebab-case" classname of the emitter that raised the event.
Frame is represented as iframe.
The type of event that was raised. Equal to the typename of the event payload in "kebab case".
Guaranteed to be unique within each topic, but can be repeated between topics (e.g. WebContentsEvents.CrashedEvent and ApplicationEvents.CrashedEvent).
Generated when a View changes its window target.
Remarks
This event will fire during creation of a View. In that case, previousTarget identity will be the same as target identity.