abstract fun <K, V> getExistingNullable(plant: AssertionPlant<Map<out K, V>>, key: K): AssertionPlantNullable<V> (source)abstract fun <K, V> getExistingNullable(plant: AssertionPlant<Map<out K, V>>, key: K, assertionCreator: AssertionPlantNullable<V>.() -> Unit): Assertion (source)