import java.lang.reflect.Method
import java.lang.reflect.Proxy

interface SomeInterface {
    fun a()
    fun b(str: String): String
}

fun main(args: Array<String>) {
    val clazz = SomeInterface::class.java
    val proxy: SomeInterface = Proxy.newProxyInstance(
            clazz.classLoader,
            arrayOf(clazz)
    ) { proxy: Any, method: Method, args: Array<Any>? ->
        print("Called method ${method.name} with arguments ${args?.toList()}")
        "Some Return"
    } as SomeInterface


    proxy.a() // Prints: Called method a with arguments null
    val ret = proxy.b("BBB") // Prints: Called method b with arguments [BBB]
    print(ret) // Prints: Some Return
}