Code for the article: "The power of lazy properties in Kotlin"

ComponentActivityExt.kt

inline fun <reified ViewModelT : ViewModel> ComponentActivity.bindViewModel() = 
    bindViewModel(ViewModelT::class, viewModelFactoryProvider)

@PublishedApi
internal fun <ViewModelT : ViewModel> ComponentActivity.bindViewModel(
    viewModelType: KClass<ViewModelT>
): Lazy<ViewModelT> = lazy {
    ViewModelProvider(this).get(viewModelType.java)
}