code: public ServiceFuture<KeyPhraseBatchResult> keyPhrasesAsync(KeyPhrasesOptionalParameter keyPhrasesOptionalParameter, final ServiceCallback<KeyPhraseBatchResult> serviceCallback) {
          return ServiceFuture.fromResponse(keyPhrasesWithServiceResponseAsync(keyPhrasesOptionalParameter), serviceCallback);
      }
docs: The API returns a list of strings denoting the key talking points in the input text.
  See the &lt;a href="https://docs.microsoft.com/en-us/azure/cognitive-services/text-analytics/overview#supported-languages"&gt;Text Analytics Documentation&lt;/a&gt; for details about the languages that are supported by key phrase extraction.
  
  @param keyPhrasesOptionalParameter the object representing the optional parameters to be set before calling this API
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object