UserActionProvider.getOptionalDefaultAction()
ContextManager.runWithContexts(Runnable, Object...)
ContextManager.runWithContexts(Supplier, Object...)
Finder.optionalFirstResult()
Finder.optionalResult()
TypeSafeMap.getOptional(Key)
TypeSafeMap.keySet()
TypeSafeMap.size()
TypeSafeMultiMap.keySet()
TypeSafeMultiMap.size()
Key.of(String, Class)