public BatchUpdateRequestBuilder<K, V> inputs(Map<K, V> entities) {
   addKeys(entities.keySet());
   for (Map.Entry<K, V> entry : entities.entrySet()) {
     K key = entry.getKey();
     V value = entry.getValue();
     _entities.getElements().add(_keyValueRecordFactory.create(key, value));
     _updateInputMap.put(key, value);
   }
   return this;
 }
 public BatchUpdateRequestBuilder<K, V> input(K id, V entity) {
   _entities.getElements().add(_keyValueRecordFactory.create(id, entity));
   addKey(id);
   _updateInputMap.put(id, entity);
   return this;
 }