}
                      notifyFailed(t);
                      return;
                    }
                  }

                  shutDown();
                  notifyStopped();
                } catch (Throwable t) {
                  restoreInterruptIfIsInterruptedException(t);
                  notifyFailed(t);
                }
              });
        }

        @Override

                  return;
                }
                shutDown();
              } finally {
                lock.unlock();
              }
              notifyStopped();
            } catch (Throwable t) {
              restoreInterruptIfIsInterruptedException(t);
              notifyFailed(t);
            }
          });
    }

    @Override

   */
  private static final class NoOpService extends AbstractService {
    @Override
    protected void doStart() {
      notifyStarted();
    }

    @Override
    protected void doStop() {
      notifyStopped();
    }
  }

  /** This is never thrown but only used for logging. */
  private static final class EmptyServiceManagerWarning extends Throwable {}