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- onCompletion(com.adyen.threeds2.ChallengeResult) - function in com.adyen.threeds2.ChallengeStatusHandler
- This method will be called when:- challenge process is completed successfully. 
- Cardholder selects the option to cancel the transaction in the challenge screen. 
- 3DS SDK receives an erroneous message from the ACS. 
- 3DS SDK encounters errors during the challenge process. 
- challenge process exceeds the timeout specified in the call for Transaction.doChallenge. 
 
- OPEN_OOB_APP - enum entry in com.adyen.threeds2.customization.UiCustomization.ButtonType