code: @Override
    protected FileBasedReader<KV<K, V>> createSingleFileReader(PipelineOptions options) {
      Set<String> serializationNames = Sets.newHashSet(
          keySerializationClass.getName(),
          valueSerializationClass.getName()
      );
      return new SeqFileReader<>(this, keyClass, valueClass,
          serializationNames.toArray(new String[serializationNames.size()]));
    }
docs: {@inheritDoc}