Kotlin loggable trait

Loggable.kt

interface Loggable {

    val logTag: String

    fun debug(message: String) = Log.d(logTag, message)

    fun debug(message: String, vararg args: String) = Log.d(logTag, message, args)

    fun debug(function: () -> String) = logIfEnabled(Log.DEBUG, function) {
        Log.d(logTag, it)
    }

    fun info(message: String) = Log.i(logTag, message)

    fun info(template: String, vararg args: String) = Log.i(logTag, template, args)

    fun info(function: () -> String) = logIfEnabled(Log.INFO, function) {
        Log.i(logTag, it)
    }

    private fun logIfEnabled(level: Int,
                             messageProducer: () -> String,
                             logFunction: (String) -> Unit) {
        if (Log.isEnabled(level)) logFunction(messageProducer())
    }
}