public CategoryPath getCellEditorValueAsCategoryPath() {
		return selectionField.getSelectedValue();
	}
If a path was selected from the drop-down list, it is already 
well-formed and cannot be null. 
@return the selected category path as CategoryPath
Ghidra/Features/Base/src/main/java/ghidra/app/util/datatype/CategoryPathSelectionEditor.java