The predicate for whether browser-pane can be used on a specified screen.
capi
browser-pane-available-p &optional screen-spec => result
| screen-spec⇩ | 
A CAPI object, a plist, or  nil,. | 
| result | 
A boolean. | 
The function browser-pane-available-p returns true if there is a browser-pane implementation for the library associated with screen-spec.
If screen-spec is not supplied, the default library is used.
If screen-spec is supplied, it must be a valid argument to convert-to-screen.
CAPI User Guide and Reference Manual (Windows version) - 01 Dec 2021 19:33:57