How to use bounding box filter?

Hi there. I am studying how to filter elements by Rhino inside.
One topic that the documentation mentions is the bounding box filter.

Not sure how this works cause there is no example of how to use it. I guess that we can use that filter to filter elements within the boundary.

Can anybody show a quick example for that?
Thank you.

Sure, fyi,

Thanks! This is exactly what I want. :clap: