MainActivity.kt

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val cooker = Cooker()
        val cafeOld = Cafe(cooker)
        cafeOld.getProduct("makarna")

        val barmen = Barmen()
        val cafeNew = Cafe(barmen)
        cafeNew.getProduct("şeftali suyu")

    }
}