Currently, the dev tools has only hooked into `next`. It makes sense to also handle other notifications. [See rxjs-spy's old devtools plugin for inspiration](https://github.com/cartant/rxjs-spy/blob/5d4ce118a30c1edc74e21b549934a1f3ef98f348/source/plugin/devtools-plugin.ts#L177).
Currently, the dev tools has only hooked into
next. It makes sense to also handle other notifications.See rxjs-spy's old devtools plugin for inspiration.