I’m trying to find out what is the correct syntax to define type parameters pack for KeyPath

// let's say we have
final class A {

    var field1: Int
    var field2: String
    var field3: Bool

    init(field1: Int, field2: String, field3: Bool) {
        self.field1 = field1
        self.field2 = field2
        self.field3 = field3
    }

}

// i need something like this (but this syntax is wrong)
func update<each T>(_ update: repeat (field: each WritableKeyPath<A, T>, new: each T)) {
    repeat self[keyPath: each update.field] = each update.new
}

// usage example
update((.field2, "new-2"), (.field1, 14))
update((.field3, false))