Hash trees are not implemented yet.

[tomguo2000]

Traceback (most recent call last):
File "ext4_test.py", line 174, in
scan_dir(volume.root, scan_result=A_scan_result)
File "ext4_test.py", line 51, in scan_dir
scan_dir(entry_inode, entry_inode_path, scan_result)
File "ext4_test.py", line 51, in scan_dir
scan_dir(entry_inode, entry_inode_path, scan_result)
File "ext4_test.py", line 51, in scan_dir
scan_dir(entry_inode, entry_inode_path, scan_result)
[Previous line repeated 3 more times]
File "ext4_test.py", line 45, in scan_dir
for entry_name, entry_inode_idx, entry_type in root_inode.open_dir():
File "ext4/ext4.py", line 851, in open_dir
raise NotImplementedError("Hash trees are not implemented yet.")
NotImplementedError: Hash trees are not implemented yet.