void function ( ) { listener . set ( null ) ; }
unregisters the listener with the registry concode_field_sep ConcurrentHashMap<KvStateID,KvState<?>> registeredKvStates concode_elem_sep AtomicReference<KvStateRegistryListener> listener concode_field_sep void unregisterKvState concode_elem_sep KvStateID registerKvState concode_elem_sep KvState<?> getKvState concode_elem_sep TaskKvStateRegistry createTaskRegistry concode_elem_sep void registerListener