docs: protected static StreamInitiation createInitiationAccept(
              StreamInitiation streamInitiationOffer, String[] namespaces) {
          StreamInitiation response = new StreamInitiation();
          response.setTo(streamInitiationOffer.getFrom());
          response.setFrom(streamInitiationOffer.getTo());
          response.setType(IQ.Type.result);
          response.setStanzaId(streamInitiationOffer.getStanzaId());
  
          DataForm form = new DataForm(DataForm.Type.submit);
          FormField field = new FormField(
                  FileTransferNegotiator.STREAM_DATA_FIELD_NAME);
          for (String namespace : namespaces) {
              field.addValue(namespace);
          }
          form.addField(field);
  
          response.setFeatureNegotiationForm(form);
          return response;
      }