code: public static ResourceList<PhoneNumber> list(final int page, final int size) throws IOException {
          return list(BandwidthClient.getInstance(), page, size);
      }
docs: Factory method for PhoneNumber list, returns list of PhoneNumber objects with page, size preferences
  @param page the current page
  @param size the page size
  @return the PhoneNumber list
  @throws IOException unexpected error.