IntoMap
@Target(allowedTargets = [AnnotationTarget.FUNCTION, AnnotationTarget.FIELD, AnnotationTarget.PROPERTY, AnnotationTarget.PROPERTY_GETTER] )
The declaration's return type forms the type argument for the value of a Map<K, () -> V>, and the combination of the annotated key and the returned value is contributed to the map as a key/value pair. The Map<K, () -> V> produced from the accumulation of values will be immutable.