it is slightly more ideomatic to use ! here #5
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problem with doing "as X" is that it doesn't only typecast you out of undefined, but it has the potential of changing the type completely (that's why new versions of TS have "satisfies" keyword).
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problem with doing "as X" is that it doesn't only typecast you out of undefined, but it has the potential of changing the type completely (that's why new versions of TS have "satisfies" keyword).