Kotlin infix do after x time

natLangDoAfter.kt

import android.os.Handler

//**/
/ * This is a helper function used for timing, written with infix functions that make it/
/ * possible to write a timer resembling natural language. It contains both seconds and milliseconds/
/ * for convenience./
/ */
/ * Usage:/
/ * Do after 100 seconds {}/
/ * Do after aHundred milliseconds {}/
/ *//
class Do {
    enum class duration {
        SECONDS, MILLISECONDS
    }
    infix fun seconds(function: () -> Unit) {
        Do.mFormat = duration.SECONDS
        Do.handle(function)
    }
    infix fun milliseconds(function: () -> Unit) {
        Do.mFormat = duration.MILLISECONDS
        Do.handle(function)
    }
    companion object {
        private var mDuration = 0
        var mFormat: duration = duration.MILLISECONDS
        fun handle(function: () -> Unit) {
            Handler().postDelayed(function,
                when (mFormat) {
                    duration.SECONDS -> mDuration * 1000L
                    duration.MILLISECONDS -> (mDuration).toLong()
                })
        }
        infix fun after(seconds: Int) : Do {
            Do.mDuration = seconds
            return Do()
        }
    }
}