Function sensitive_areas 

pub fn sensitive_areas(root: &dyn Widget, path: &str, whole: Rect) -> Vec<Rect>

Where a picture of the node at path (whose bounds are whole) must be masked: every text that is not the app’s own interface copy, every image and every protected field under it. Unlike capture nothing is left out for length: past MAX_SENSITIVE areas, or where the node is gone, the whole part is masked.