Kotlin: Injetando um Logger em Person

test.kt

interface Logger {
    abstract fun log(msg: String)
}

class ConsoleLogger : Logger {
    override fun log(msg: String) {
        println("Log: $msg")
    }
}

class FileLogger : Logger {
    override fun log(msg: String) {
        println("Log to file: $msg")
    }
}

class Person(val name: String, val logger: Logger) {
    fun hello() {
        logger.log("Hello, $name!")
    }
    
    fun bye() {
        logger.log("Bye!")
    }
}

fun main() {
    val console = ConsoleLogger()
    val file    = FileLogger()
    val person  = Person("tag", console)
    
    person.hello()
    person.bye()
}