Design pattern used to implement IoC. It allows creating the dependent objects outside of the class and provides those objects in different ways.

DiDriver.kt

fun main() {

    val redSauce = RedSauce()
    val whiteSauce = WhiteSauce()
    val greenSauce = GreenSauce()

    val redSaucePasta = Pasta(redSauce)
    println(redSaucePasta.getPasta())

    val whiteSaucePasta = Pasta(whiteSauce)
    println(whiteSaucePasta.getPasta())

    val greenSaucePasta = Pasta(greenSauce)
    println(greenSaucePasta.getPasta())

}

Pasta.kt

class Pasta {

    private lateinit var sauce: Sauce

    constructor(sauce: Sauce) {
        this.sauce = sauce
    }

    fun getPasta(): String = "I am pasta with ${sauce.getSauceType()} sauce"

}

Sauce.kt

interface Sauce {
    fun getSauceType(): String
}

class RedSauce : Sauce {
    override fun getSauceType(): String = "Red"
}

class WhiteSauce : Sauce {
    override fun getSauceType(): String = "White"
}

class GreenSauce : Sauce {
    override fun getSauceType(): String = "Green"
}