code: public DocServiceBuilder exampleHttpHeaders(Class<?> serviceType, HttpHeaders... exampleHttpHeaders) {
          requireNonNull(serviceType, "serviceType");
          return exampleHttpHeaders(serviceType.getName(), exampleHttpHeaders);
      }
docs: Adds the example {@link HttpHeaders} for the service with the specified type. This method is
  a shortcut to:
  <pre>{@code
  exampleHttpHeaders(serviceType.getName(), exampleHttpHeaders);
  }</pre>