fun <E:Any, T:Iterable<E?>>Assert<T>.enthaeltStriktNullableEintraege(assertionCreatorOrNull:(Assert<E>.()->Unit)?, varargotherAssertionCreatorsOrNulls:(Assert<E>.()->Unit)?): AssertionPlant<T> Deprecated: Replaced with enthaeltExakt for clearer naming; will be removed with 1.0.0