member-extension-fun.kt

class PrintingCustomizer { // PrintingCustomizer is a dispatch receiver
    private val separator = "________________"

    fun <K, V> Map<K, V>.customPrint() { // Map<T, V> is an extension receiver for customPrint
        forEach { (k, v) ->
            println("K: $k")
            println("V: $v")
            println(separator)
        }
    }
}