Companion

popExceptionManager pops the current exception manager and reactivates a possible former exception manager,

proceed the current process by invoking the next applicable method with respect to the specified argument. If the argument does not correspond to the current argument of the chain, the complete list of applicable methods will be recomputed and the current argument will be set to this new value.

Calling pushExceptionManager pushed a new exception manager on the stack. If an exception manager is already active in the current thread, the new exception manager will shadow the old one, i.e. that the registered handlers of the new exception manager will be applied before the handlers of the old one. Only, if an exception is not handled, the exception handlers of the old exception manager will be applied.