* Set on each phone's window as `__dispatchLink`. Holding the link freezes the phone's view
* of dispatch: what it sends is queued and what it receives is buffered, while the app keeps
* running on what it last saw. Releasing sends the queue in order, then delivers the buffered
* messages. Tests use it to stage races, e.g. two drivers accepting the same ride before
* either hears about the other.
*/
export type DispatchLinkControl = { hold: () => void; release: () => void; readonly held: boolean };
declare global {
interface Window {
__dispatchLink?: DispatchLinkControl;
}
}
