Method join

app/src/main/java/eu/faircode/email/Core.java:5939–5942

()

        }

        void join() {
            join(thread);
            CoalMine.watch(thread, getClass().getSimpleName() + "#join()");
        }

        void ensureRunning(String reason) throws OperationCanceledException {
            if (!recoverable && unrecoverable != null)