public DomainFolder getDomainFolder() {
		if (cancelled) {
			return null;
		}
		if (domainFolder == null) {
			domainFolder = treePanel.getSelectedDomainFolder();
		}
		return domainFolder;
	}
Get the selected folder.
@return null if there was no domain folder selected
Ghidra/Features/Base/src/main/java/ghidra/framework/main/AbstractDataTreeDialog.java