code: public List<Webhook> list() throws OpenpayServiceException, ServiceUnavailableException {
  		String path = String.format(BASE_PATH, this.getMerchantId());
  		return this.getJsonClient().list(path, new HashMap<String, String>(), Webhook.class);
  	}
docs: <p>Método que permite obtener todos los webhook's de un merchant</p>
  @return Regresa un listado de objetos Webhook.