Swizzle methods between two custom objects

SwizzleWithCustomObjects.swift

class MyObject: NSObject {
    @objc dynamic func getName(_ name: String) -> String {
        return name
    }
}

class FakeMyObject: NSObject {
    @objc dynamic func getName(_ name: String) -> String {
        return name + " concat"
    }
}

class Swizzler {

    func performSwizzle() {
        
        guard let m1 = class_getInstanceMethod(
                MyObject.self,
                #selector(MyObject.getName(_:))
        ) else {
            return
        }

        guard let m2 = class_getInstanceMethod(
                FakeMyObject.self,
                #selector(FakeMyObject.getName(_:))
        ) else {
            return
        }
        
        method_exchangeImplementations(m1, m2)
    }
    
}

let swizzler = Swizzler()
swizzler.performSwizzle()

let myObject = MyObject()
let name = myObject.getName("User")
print(name) // Result: "User concat"

let fakeMyObject = FakeMyObject()
let fakeName = fakeMyObject.getName("User")
print(fakeName) // Result: "User"