FailureHandlerAdapter(failureHandler: SubjectChanger.FailureHandler<R1, R>, map: (T) -> R1)
Represents a SubjectChanger.FailureHandler which acts as an adapter for another failure handler by mapping first the given subject to another type R1 which is understood as input of the other failure handler.
Effectively turning a FailureHandler<R1, R> into a FailureHandler<T, R> with the help of a mapping
function (T) -> R1
R1 - The type of the mapped subject
R - The type of the subject after the subject change (if it were possible).