protected final FlushAction<K, V, A> buildFlushAction(MapperPair<K, V, A> mapperPair) {
final A actionKey = mapperPair.getActionKey();
final String prefix = getOutputFilePrefix(actionKey);
final File flushDir = new File(outDir, prefix);
return buildFlushAction(
actionKey,
flushDir,
ResourceHelper.buildNameGenerator(prefix + "-", ".gz", numDigits, chainNum),
maxPairs,
buildFlushFileStrategy());
}
