fun merge(options: RootExpectOptions<T>): RootExpectOptions<T>
Merges the given options with this object creating a new RootExpectOptions where defined properties in options will have precedence over properties defined in this instance.
For instance, this object has defined representationInsteadOfSubject (meaning it is not null) and
the given options as well, then the resulting RootExpectOptions will have the
representationInsteadOfSubject of options.