* ‘content’ is a template; the module returns a list of toplevels,
each one instantiated using the content template.
* Each toplevel has 6 tags:
- app-id (string)
- title (string)
- maximized (bool)
- minimized (bool)
- activated (bool)
- fullscreen (bool)
To show the application name and title of the currently active window,
one can do:
- foreign-toplevel:
content:
map:
tag: activated
values:
false: {empty: {}}
true: {string: {text: "{app-id}: {title}"}}
