@SafeVarargs
  final <T> void deleteValues(final String regionNamePath, final T... keys) {
    // Check whether all keys exist in cache or not
    for (final T key : keys) {
      checkForKeyExist(regionNamePath, key.toString());
    }

    for (final T key : keys) {
      deleteValue(regionNamePath, key);
    }
  }
AbstractBaseController class contains common functionalities required for other controllers.

@since GemFire 8.0
geode-web-api/src/main/java/org/apache/geode/rest/internal/web/controllers/AbstractBaseController.java