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The interesting thing here is you can still get the error and display the message! Just that you _might_ be able to catch issues beforehand as well, and avoid even getting to that kind of code.

Typescript's practicality here does let you walk and chew bubblegum. This sort of stuff is super practical for UI development, because ultimately at the interfaces with servers you're likely to make some assumptions about incoming data, and so you'll have that fundamental cast in your code from any to Foo, and this sort of error will be reportable.




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