| ⇢ | A | FilterFactory added | |
| ⇢ | A | SlotFactory added | |
| ⇢ | A | PostFilter added | |
| ⇢ | A | PreFilter added |
| ⇢ | B | SlotFactory::create() added | |
| ⇢ | A | Signal::filter() added | |
| ⇢ | A | FilterFactory::create() added | |
| ⇢ | A | PostFilter::filter() added | |
| ⇢ | A | PreFilter::filter() added | |
| ⇢ | A | Signal::getFilters() added | |
| ⇢ | A | Signal::setDi() added | |
| ⇢ | A | Signal::getDi() added | |
| C | ↘ | D | Signal::emit() got worse |