public @NonNull Predicate<T> exceptionFilter() {
        return this.exceptionFilter;
    }
Returns the exception filter.
<p>
Exceptions should only be handled by the {@link #exceptionHandler()} if the predicate evaluates to {@code true}.

@return the exception filter
cloud-core/src/main/java/org/incendo/cloud/exception/handling/ExceptionHandlerRegistration.java