When using cursor must the record be unknown?

[BlitzkriegSoftware]

In all the examples reading the file using the cursor yields records with unknown types, can't we have these be strongly typed as that is what was used to write the file? If so how?

[BlitzkriegSoftware]

let record: Fruit;
while ((record = await cursor.next())) {
...
}

Error: "Type 'unknown' is not assignable to type 'Fruit'.ts(2322)"