FindNext
status_t FindNext(Path* path, btrfs_key& key,
fCurrentExtentTree->FindNext(&path, fKey, NULL);
status = fCurrentExtentTree->FindNext(&path, fKey, (void**)&fItem);
status = fTree->FindNext(&chosen, start, size, type);
status_t FindNext(CachedExtent** chosen, uint64 offset,
bool FindNext();
ptype.FindNext();
if (ptype.FindNext())
if (ptype.FindNext())