What was the first known use of the phrase "It's curtains", commonly heard in gangster movies of the 1920s and 30s?

The phrase has been around for a long time, and is derived from the theatre, where the end of a performance is traditionally signalled by the dropping or closing of a curtain. In the script, the final stage direction usually reads "Curtain", indicating that everything is finished. Its popular use (either as a threat or in a more joking fashion) stems from its widespread use in movies, but I have been unable to locate the first movie to use the phrase. Or, indeed, any specific example - it's just one of those phrases everyone knows they heard in a gangster movie!

https://grammarist.com/idiom/its-curtains-for-you/