code: public static void runExample(AdManagerServices adManagerServices, AdManagerSession session)
        throws RemoteException {
      // Get the CustomFieldService.
      CustomFieldServiceInterface customFieldService =
          adManagerServices.get(session, CustomFieldServiceInterface.class);
  
      // Create a statement to get all custom fields.
      StatementBuilder statementBuilder = new StatementBuilder()
          .orderBy("id ASC")
          .limit(StatementBuilder.SUGGESTED_PAGE_LIMIT);
  
      // Default for total result set size.
      int totalResultSetSize = 0;
  
      do {
        // Get custom fields by statement.
        CustomFieldPage page =
            customFieldService.getCustomFieldsByStatement(statementBuilder.toStatement());
  
        if (page.getResults() != null) {
          totalResultSetSize = page.getTotalResultSetSize();
          int i = page.getStartIndex();
          for (CustomField customField : page.getResults()) {
            System.out.printf(
                "%d) Custom field with ID %d and name '%s' was found.%n", i++,
                customField.getId(), customField.getName());
          }
        }
  
        statementBuilder.increaseOffsetBy(StatementBuilder.SUGGESTED_PAGE_LIMIT);
      } while (statementBuilder.getOffset() < totalResultSetSize);
  
      System.out.printf("Number of results found: %d%n", totalResultSetSize);
    }
docs: Runs the example.
  
  @param adManagerServices the services factory.
  @param session the session.
  @throws ApiException if the API request failed with one or more service errors.
  @throws RemoteException if the API request failed due to other errors.