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You're on the right track :)

In the top right, there's a lightbulb you can click to reveal a hint for each mission. For this level the tip says "RecordingDevice is an interface, so it should be possible to create your own type of Camera".

On Reddit there's a thread that also contains some additional tips for some of the missions: https://www.reddit.com/r/golang/comments/c2hsaj/operation_go...

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