THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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class DelegationTokenRequest(renewer: option(KafkaPrincipal) = None, maxLifeTime: long = -1)
class DelegationTokenResponse(owner: KafkaPrincipal, expiryTimeMillis: long, renewer: option(KafkaPrincipal) = None, maxLifeTime: long = -1, tokenId: String, hmac: byte[])
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