default void deleteAll(Collection<K> keys) {
    try {
      deleteAllAsync(keys).get();
    } catch (InterruptedException | ExecutionException e) {
      throw new SamzaException("DELETE failed for " + keys, e);
    }
  }
Delete all {@code records} with the specified {@code keys} from the remote store
The default implementation calls deleteAllAsync and blocks on the completion afterwards.
@param keys keys for the table records to be written
samza-api/src/main/java/org/apache/samza/table/remote/TableWriteFunction.java