ReadOnlyOptionalKeyCombinationPropertyWrapper
class ReadOnlyOptionalKeyCombinationPropertyWrapper(wraps: OptionalKeyCombinationProperty) : ReadOnlyPropertyWrapper<KeyCombination?, Property<KeyCombination?>> , ReadOnlyOptionalKeyCombinationProperty
Boilerplate which avoids having to use generics.
Similar to ReadOnlyKeyCombinationPropertyWrapper, but the value can also be null.