Chat UI API documentation is missing information

[j44499]

I'm submitting a ...

• [x ] bug report

Issue description

Current behavior:

By looking at Chat UI API docs here -
https://akveo.github.io/nebular/docs/components/chat-ui/api#nbchatcomponent

I see no "title" input described. But I can set in on NbChat like so:
<nb-chat [title]="chatTitle">