Example of how to emulate multiple recievers with bounded polymorphism in Kotlin

EmulateMultiReceivers.kt

interface Logging {
    fun log(message: String)
}

interface Prompt {
    fun promptUser(): String
}

fun <Ctx> Ctx.exampleFn() where Ctx: Logging, Ctx: Prompt {
    val message = promptUser()
    log("Enter a message of length exactly 3:")
    if (message.length == 3) {
        log("Good!")
    } else {
        log("Not so good.")
    }
}