inline fun <reified T : Any> IAssertionPlantNullable<T?>.istNichtNull(noinline assertionCreator: IAssertionPlant<T>.() -> Unit): Unit
Makes the assertion that IAssertionPlantNullable.subject is not null and if so, uses assertionCreator which could create further assertions which are added as a group.
AssertionError - Might throw an AssertionError if the assertion made is not correct.
Return
Notice, that this assertion function cannot provide a fluent API because it depends on whether the first
assertion (IAssertionPlant.subject is not null) holds or not.
Define subsequent assertions via the assertionCreator lambda.