code: public ServiceFuture<FeatureResultInner> getAsync(String resourceProviderNamespace, String featureName, final ServiceCallback<FeatureResultInner> serviceCallback) {
          return ServiceFuture.fromResponse(getWithServiceResponseAsync(resourceProviderNamespace, featureName), serviceCallback);
      }
docs: Gets the preview feature with the specified name.
  
  @param resourceProviderNamespace The resource provider namespace for the feature.
  @param featureName The name of the feature to get.
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object