This is confusing

So in the video before this it's telling me that in the next challenge I'm going to make a function called "isDivisible" where it tells if something is divisible or not, returns a boolean, then prints "Divisible" or "Not Divisible". Now when I get here it's telling me that I have to make a function called "isNotDivisible" that does the opposite so I first followed the challenge instructions and deleted the isDivisible thing, which didn't work. Then I tried doing it with the isDivisible function. I didn't work. I tried following the video's instructions with "isDivisible" ,which didn't work. Then I turned the video's example into "isNotDivisible", changed some stuff, and submitted, which didn't work. I'm very confused.

func isDivisible (dividend dividend: Int, divisor: Int) -> Bool {
    if dividend % divisor != 0 {
        return true
    } else {
        return false
    }
}
if let result = isNotDivisible(dividend: 10, divisor: 2) {
    print("Divisible")
} else {
    print("Not Divisible")
}