force_update

Synchronously and immediately updates the list of Window on this.

This bypasses the standard update mechanism, where the list of Window is updated in the idle loop.

This is usually a bad idea for both performance and correctness reasons (to get things right, you need to write model-view code that tracks changes, not get a static list of open windows). However, this function can be useful for small applications that just do something and then exit.

Parameters: