| ⇢ | A | SubscribableObject added | |
| C | ↗ | B | Pulse improved |
| ⇢ | A | SubscribableObject::getSubscribers() added | |
| ⇢ | A | SubscribableObject::addSubscriber() added | |
| ⇢ | A | SubscribableObject::removeSubscriber() added | |
| ⇢ | A | SubscribableObject::getId() added | |
| A | ↛ | Pulse::removeSubscriber() removed | |
| A | ↛ | PulseBoard::addSubscriber() removed | |
| A | ↛ | PulseBoard::removeSubscriber() removed | |
| A | ↛ | PulseBoard::getSubscribers() removed | |
| A | ↛ | Pulse::addSubscriber() removed | |
| A | ↛ | Pulse::getSubscribers() removed | |
| A | ↛ | Pulse::getId() removed |