code: public ServiceFuture<FoundFaces> findFacesAsync(FindFacesOptionalParameter findFacesOptionalParameter, final ServiceCallback<FoundFaces> serviceCallback) {
          return ServiceFuture.fromResponse(findFacesWithServiceResponseAsync(findFacesOptionalParameter), serviceCallback);
      }
docs: Returns the list of faces found.
  
  @param findFacesOptionalParameter 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