Hey, fantastic plugin! I can't figure out what the Identifier is for, and the link for explanations didn't help. It says it's required, but I don't know what to put there.
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You can put anything! When you use it to display the time, call it "time", when it's a short "Hello stranger!" speechbubble then call it "hello". The identifier helps you to change a window later so you can tell which window you are referring to. Therefore the identifier should be unique across your game but besides that there are no rules