infix fun <T : Throwable> Assert<T>.(source)
message(assertionCreator: Assert<String>.() -> Unit): Unit
Creates an AssertionPlantNullable for the message of the plant's subject (which is a Throwable) and makes the assertion that the message ought notToBeNull and uses assertionCreator which might create further Assertions which are lazily evaluated at the end.
AssertionError - Might throw an AssertionError in case message is
or if an additionally created Assertions (by calling assertionCreator) does not hold.
Notice, that this assertion function cannot provide a fluent API because it depends on whether the first assertion message is not null) holds or not. Define subsequent assertions via the assertionCreator lambda.