Sets or unsets the gtk.Application associated with the window.
The application will be kept alive for at least as long as it has any windows
associated with it (see Application.hold for a way to keep it alive
without windows).
Normally, the connection between the application and the window will remain
until the window is destroyed, but you can explicitly remove it by setting
the application to NULL.
Sets or unsets the gtk.Application associated with the window.
The application will be kept alive for at least as long as it has any windows associated with it (see Application.hold for a way to keep it alive without windows).
Normally, the connection between the application and the window will remain until the window is destroyed, but you can explicitly remove it by setting the application to NULL.
This is equivalent to calling Application.removeWindow and/or Application.addWindow on the old/new applications as relevant.