The predicate for top level interfaces.
capi
top-level-interface-p pane => result
|   pane⇩  |    
A Lisp object.  | 
|   result  |    
A boolean.  | 
The generic function top-level-interface-p returns true if pane is a top level interface.
top-level-interface
top-level-interface-geometry
top-level-interface-display-state
interface
element
3.7 Hierarchy of panes
CAPI User Guide and Reference Manual (Macintosh version) - 01 Dec 2021 19:31:27