Method cancel

core/src/main/java/io/grpc/internal/Rescheduler.java:69–75

(boolean permanent)

  // must be called from channel executor
  void cancel(boolean permanent) {
    enabled = false;
    if (permanent && wakeUp != null) {
      wakeUp.cancel(false);
      wakeUp = null;
    }
  }

  private final class FutureRunnable implements Runnable {
    @Override