Query parameter key used to pass a window's platform id to its renderer process. Durable: on a
restored window this is the id its persisted layout entry already carries (see
WindowLayoutEntry.windowId), so the renderer's per-window storage keyed by it survives a
restart under the same id.
Query parameter key used to pass a window's platform id to its renderer process. Durable: on a restored window this is the id its persisted layout entry already carries (see
WindowLayoutEntry.windowId), so the renderer's per-window storage keyed by it survives a restart under the same id.