* the listeners only when it differs.
*/
private final AtomicInteger lastNotifiedModCnt = new AtomicInteger();
RefDirectory(final FileRepository db) {
final FS fs = db.getFS();
parent = db;
gitDir = db.getDirectory();
logWriter = new ReflogWriter(db);
refsDir = fs.resolve(gitDir, R_REFS);
packedRefsFile = fs.resolve(gitDir, PACKED_REFS);
looseRefs.set(RefList.<LooseRef> emptyList());
packedRefs.set(PackedRefList.NO_PACKED_REFS);
}