@API(status = API.Status.STABLE)
    public @NonNull Map<@NonNull Class<? extends Annotation>, @NonNull PreprocessorMapper<?, C>> preprocessorMappers() {
        return Collections.unmodifiableMap(this.preprocessorMappers);
    }
Returns an unmodifiable view of the preprocessor mappers.

@return the preprocessor mappers
cloud-annotations/src/main/java/org/incendo/cloud/annotations/AnnotationParser.java