public virtual void DeletePersonFace(string personGroupId, Guid personId, Guid persistedFaceId)
 {
     PolicyService.ExecuteRetryAndCapture400Errors(
         "FaceService.DeletePersonFace",
         ApiKeys.FaceRetryInSeconds,
         () =>
     {
         FaceRepository.DeletePersonFace(personGroupId, personId, persistedFaceId);
         return(true);
     },
         false);
 }