public static final class UfsSyncUtils.SyncPlan
A class describing how to sync an inode with the ufs.
A sync plan has several steps:
1. updateMetadata: the file or directory should update its metadata from UFS
2. delete: the inode should be deleted
3. syncChildren: the inode is a directory, and the children should be synced
4. loadMetadata: the inode metadata should be loaded from UFS