code: public void marshall(SearchAvailablePhoneNumbersRequest searchAvailablePhoneNumbersRequest, ProtocolMarshaller protocolMarshaller) {
  
          if (searchAvailablePhoneNumbersRequest == null) {
              throw new SdkClientException("Invalid argument passed to marshall(...)");
          }
  
          try {
              protocolMarshaller.marshall(searchAvailablePhoneNumbersRequest.getAreaCode(), AREACODE_BINDING);
              protocolMarshaller.marshall(searchAvailablePhoneNumbersRequest.getCity(), CITY_BINDING);
              protocolMarshaller.marshall(searchAvailablePhoneNumbersRequest.getCountry(), COUNTRY_BINDING);
              protocolMarshaller.marshall(searchAvailablePhoneNumbersRequest.getState(), STATE_BINDING);
              protocolMarshaller.marshall(searchAvailablePhoneNumbersRequest.getMaxResults(), MAXRESULTS_BINDING);
              protocolMarshaller.marshall(searchAvailablePhoneNumbersRequest.getNextToken(), NEXTTOKEN_BINDING);
          } catch (Exception e) {
              throw new SdkClientException("Unable to marshall request to JSON: " + e.getMessage(), e);
          }
      }
docs: Marshall the given parameter object.