code: @Override
      public List<String> getTraitNames(String guid) throws AtlasException {
          guid = ParamChecker.notEmpty(guid, "entity id");
          return repository.getTraitNames(guid);
      }
docs: Gets the list of trait names for a given entity represented by a guid.
  
  @param guid globally unique identifier for the entity
  @return a list of trait names for the given entity guid
  @throws AtlasException