code: public ServiceCall<Classifier> createClassifier(CreateClassifierOptions createClassifierOptions) {
      Validator.notNull(createClassifierOptions, "createClassifierOptions cannot be null");
      String[] pathSegments = { "v1/classifiers" };
      RequestBuilder builder = RequestBuilder.post(RequestBuilder.constructHttpUrl(getEndPoint(), pathSegments));
      Map<String, String> sdkHeaders = SdkCommon.getSdkHeaders("natural_language_classifier", "v1", "createClassifier");
      for (Entry<String, String> header : sdkHeaders.entrySet()) {
        builder.header(header.getKey(), header.getValue());
      }
      builder.header("Accept", "application/json");
      MultipartBody.Builder multipartBuilder = new MultipartBody.Builder();
      multipartBuilder.setType(MultipartBody.FORM);
      RequestBody trainingMetadataBody = RequestUtils.inputStreamBody(createClassifierOptions.metadata(),
          "application/json");
      multipartBuilder.addFormDataPart("training_metadata", "filename", trainingMetadataBody);
      RequestBody trainingDataBody = RequestUtils.inputStreamBody(createClassifierOptions.trainingData(), "text/csv");
      multipartBuilder.addFormDataPart("training_data", "filename", trainingDataBody);
      builder.body(multipartBuilder.build());
      return createServiceCall(builder.build(), ResponseConverterUtils.getObject(Classifier.class));
    }
docs: Create classifier.
  
  Sends data to create and train a classifier and returns information about the new classifier.
  
  @param createClassifierOptions the {@link CreateClassifierOptions} containing the options for the call
  @return a {@link ServiceCall} with a response type of {@link Classifier}