Boolean: whether this TNodeFile is managing an open file

returns

true if successful

Closes the underlying file without saving changes.
If there are outstanding references to Root or any subtree, it will be copied into memory, with the references transparently redirected there. (so it's more efficient to lose your references before closing the file.)
Once closed, the TNodeFile can be reused to open another file.

returns

true if successful

Saves any nodes for which node.Changed is true.
Node.changed is set automatically for structural changes (Parent, Child, DataSize) but you should set it manually after modifying the data's contents.
The file must already be open.

name		the path of a file to open or create
canWrite		true: open or create a file with read-write permissions false: open an existing file read-only
overwrite		if the file already exists, and canWrite, replace it with a new file
returns		true if successful

Opens or creates a qubtree binary file on disk.