code: public ServiceFuture<VerifyResult> verifyFaceToFaceAsync(UUID faceId1, UUID faceId2, final ServiceCallback<VerifyResult> serviceCallback) {
          return ServiceFuture.fromResponse(verifyFaceToFaceWithServiceResponseAsync(faceId1, faceId2), serviceCallback);
      }
docs: Verify whether two faces belong to a same person or whether one face belongs to a person.
  
  @param faceId1 FaceId of the first face, comes from Face - Detect
  @param faceId2 FaceId of the second face, comes from Face - Detect
  @param serviceCallback the async ServiceCallback to handle successful and failed responses.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the {@link ServiceFuture} object