> +      Properties overrides = new Properties();
> +      overrides.setProperty(POLL_INITIAL_PERIOD, POLL_PERIOD_TWENTY_SECONDS);
> +      overrides.setProperty(POLL_MAX_PERIOD, POLL_PERIOD_TWENTY_SECONDS);
> +
> +      ComputeServiceContext context = ContextBuilder.newBuilder(PROVIDER)
> +            .credentials(serviceAccountEmailAddress, serviceAccountKey)
> +            .overrides(overrides)
> +            .buildView(ComputeServiceContext.class);
> +      computeService = context.getComputeService();
> +   }
> +
> +   /**
> +    * This will delete all servers in group {@link Constants#NAME}
> +    */
> +   private void deleteServer() {
> +      System.out.format("Delete Server%n");

How about something like `format("Delete Servers in group %s%n", NAME)`

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