trackerData 
  Configures a block to inject custom data into the MutableMediaItemTrackerData used for tracking media playback.
The provided block will be executed when creating the tracker data, giving you access to:
this: the MutableMediaItemTrackerData instance being configured.Resource: the Resource being tracked.Chapter: the Chapter being tracked.MediaComposition: the current MediaComposition.
Example
val srgAssetLoader = SRGAssetLoader(context) {
    trackerData { resource, chapter, mediaComposition ->
        this["event-logger"] = FactoryData(SRGEventLoggerTracker.Factory(), Unit)
    }
}Content copied to clipboard
Parameters
block
The configuration block to execute.