[DirectoryTree]When you are using name as an "id" you will get an error when the same name occurs again for example

[jswistak]

For example when we will have inside our folder a with folder c with folder d and b with folder c with folder e the output will be

a
-c
--d
b
-c
--d

but should be

a
-c
--d
b
-c
--e

[jswistak]

Error occurs cause you are using folder's name as an id in 32-nd line.