Whether the nearest AccountWait has a request in flight.
Returns boolean
true while the surrounding surface is waiting
Remarks
Returns false outside an AccountWait, so a component can consult the
surrounding wait without requiring one. AccountSubmitArea uses it to keep
its button in flight for waits that outlast their request — sign-in's, which
continues into the navigation after the credentials are accepted.
Whether the nearest AccountWait has a request in flight.