ClosedCaptionDeduplicationConfig   
  constructor(duplicateCleanupFrequencyMs: Long = DEFAULT_DUPLICATE_CAPTIONS_AUTO_CLEANUP_TIME_MS, autoRemoveDuplicateCaptions: Boolean = true, captionSplitFactor: Int = 2)
Parameters
duplicateCleanupFrequencyMs   
The duration (in milliseconds) after which ClosedCaptionManager.seenKeys will be automatically removed. Set to DEFAULT_DUPLICATE_CAPTIONS_AUTO_CLEANUP_TIME_MS by default.
autoRemoveDuplicateCaptions   
Determines whether client sdk should be deduplicate closed captions or not
captionSplitFactor  
Factor to determine how many items to clean (e.g., 2 means clean half)