asClock

Creates a Clock that uses the time mark at the moment of creation to determine how far the current moment is from the origin.

@JvmName(name = "fromTimeSource")fun TimeSource.asClock(origin: Instant): Clock(source)

import kotlin.time.*
import kotlin.time.TimeSource.Monotonic

fun main() {
    val origin = Instant.now()
    val clock = Monotonic.asClock(origin)

    println("Elapsed time from origin: ${clock.elapsedNow()}")
}

Source