Shared Preferences Kotlin property delegate with injected provider

SharedPreferencesPropertyDelegate.kt

import android.app.Activity
import kotlin.reflect.KProperty

interface SharedPreferencesWriter //TODO

interface SharedPreferencesWriterProvider {
    val sharedPreferencesWriter: SharedPreferencesWriter

    fun <T> prefs() = SharedPreferencesPropertyDelegate<T>()
}

class SharedPreferencesPropertyDelegate<T> {
    operator fun getValue(thisRef: SharedPreferencesWriterProvider, property: KProperty<*>): T {
        val sp = thisRef.sharedPreferencesWriter
        TODO()
    }

    operator fun setValue(thisRef: SharedPreferencesWriterProvider, property: KProperty<*>, value: T) {
        val sp = thisRef.sharedPreferencesWriter
        TODO()
    }
}

class SampleActivity :
    Activity(),
    SharedPreferencesWriterProvider {

    override val sharedPreferencesWriter: SharedPreferencesWriter
        get() = TODO()

    val someProperty: String by prefs()
}