fun <E : Any, T : Iterable<E?>> <ERROR CLASS><E?, T, <ERROR CLASS>>.entry(assertionCreatorOrNull: (<ERROR CLASS><E>.() -> Unit)?): <ERROR CLASS><T>Finishes the specification of the sophisticated contains assertion where an entry shall be searched which either
holds all assertions assertionCreatorOrNull might create or needs to be null in case assertionCreatorOrNull
is defined as null.
Delegates to entries(assertionCreatorOrNull).
assertionCreatorOrNull - The identification lambda which creates the assertions which the entry we are looking
for has to hold; or in other words, the function which defines whether an entry is the one we are looking for
or not. In case it is defined as null, then an entry is identified if it is null as well.
AssertionError - Might throw an AssertionError if the assertion made is not correct.
Return
The AssertionPlant for which the assertion was built to support a fluent API.