Add/register new observer
Unregister observer
get all observers
check if observer is already registered
Notify all observers about an event.
Notify all collections, especially Sets including this element, then something has changed, so Set may need to control if elements are still unique and in the correct order
Generated using TypeDoc
Observable
Interface must be implemented in all Elements used in every "observer sets" e.g. HashSetObs, SimpleSetObs, SortedSetObs, SortedHashSetObs etc.
Those sets watch changes in every attached object and in case of any key-changes (e.g. changes which may affect elements uniqueness or order of elements in set set is being refreshed)