code: public Jashing bootstrap() {
          if (bootstrapped.compareAndSet(false, true)) {
  
              /* bootstrap event sources* */
              ServiceManager eventSources = injector.getInstance(ServiceManager.class);
              eventSources.startAsync();
  
              /* bootstrap server */
              Service application = injector.getInstance(JashingServer.class);
              application.startAsync();
  
              Runtime.getRuntime().addShutdownHook(shutdownHook);
              LOGGER.info("Jashing has started!");
          } else {
              throw new IllegalStateException("Jashing already bootstrapped");
          }
          return this;
      }
docs: Bootstaps Jashing. This operation is allowed only once. Bootstrapping already started Jashing is not permitted
  
  @return yourself