popUntil method

void popUntil (RoutePredicate predicate)

Calls pop repeatedly until the predicate returns true.

The predicate may be applied to the same route more than once if Route.willHandlePopInternally is true.

To pop until a route with a certain name, use the RoutePredicate returned from ModalRoute.withName.

The routes are closed with null as their return value.

See pop for more details of the semantics of popping a route.

Typical usage is as follows:
void _doLogout() {


void popUntil(RoutePredicate predicate) {
  while (!predicate(_history.last))