Converted tutorial Java source to Kotlin.
Original Source: https://docs.aws.amazon.com/ja_jp/amazondynamodb/latest/developerguide/Streams.KCLAdapter.Walkthrough.CompleteProgram.html
Converted tutorial Java source to Kotlin.
Original Source: https://docs.aws.amazon.com/ja_jp/amazondynamodb/latest/developerguide/Streams.KCLAdapter.Walkthrough.CompleteProgram.html