@Override
	public FSRL getFSRL() {
		return modelNode != null && modelNode.fsRef != null
				? modelNode.fsRef.getFilesystem().getFSRL()
				: null;
	}
A GTreeNode that represents the root of a {@link GFileSystem}, and keeps the
filesystem pinned in memory with its {@link FileSystemRef}.
<p>
The {@link FileSystemRef} is released when this node is {@link #dispose()}d.
<p>
Since GTreeNodes are cloned during GTree filtering, and this class has a reference to an external
resource that needs managing, this class needs to keeps track of the original modelNode
and does all state modification using the modelNode's context.
Ghidra/Features/Base/src/main/java/ghidra/plugins/fsbrowser/FSBRootNode.java