Function pin_widget_window 

pub fn pin_widget_window<R: Runtime>(win: &WebviewWindow<R>, skip_taskbar: bool)

Available on Linux and crate feature linux only.

Pin a widget webview as a desktop-layer surface when possible.

• X11: _NET_WM_WINDOW_TYPE_DESKTOP (+ _NET_WM_STATE_SKIP_TASKBAR when requested).
• Wayland (feature = "layer-shell"): remap into a gtk-layer-shell Background surface.
• Failures are logged; the ordinary frameless window remains usable (fallback).