code: public WebhookClientBuilder newBuilder(Webhook webhook)
      {
          Checks.notNull(webhook, "Webhook");
          return newBuilder(webhook.getIdLong(), webhook.getToken());
      }
docs: Creates a new {@link net.dv8tion.jda.webhook.WebhookClientBuilder WebhookClientBuilder}
  with the defined default settings of this cluster.
  
  @param  webhook
  The target webhook
  
  @throws java.lang.IllegalArgumentException
  If the webhook is {@code null}
  
  @return The WebhookClientBuilder with default settings
  
  @see    net.dv8tion.jda.webhook.WebhookClientBuilder#WebhookClientBuilder(Webhook) new WebhookClientBuilder(Webhook)