如何在swift中创建像sorted()这样的方法，它将接收器作为参数？

extension Array {
    func customSorted(by areInIncreasingOrder: (Element, Element) -> Bool) -> [Element] {
        var sortedArray = self
        for i in 0..<sortedArray.count {
            for j in 0..<sortedArray.count - 1 - i {
                if !areInIncreasingOrder(sortedArray[j], sortedArray[j+1]) {
                    sortedArray.swapAt(j, j+1)
                }
            }
        }
        return sortedArray
    }
}

let numbers = [5, 2, 8, 1, 9]
let sortedNumbers = numbers.customSorted(by: <)
print(sortedNumbers) // 输出：[1, 2, 5, 8, 9]