private Namespace getSelectedNamespace() {
		Object selectedItem = namespaceChoices.getSelectedItem();
		if (selectedItem == null) {
			return null;
		}
		return ((NamespaceWrapper) selectedItem).getNamespace();
	}
Invokes the dialog to edit an existing label in the given program
@param targetSymbol the symbol(label) to edit
@param targetProgram the program containing the symbol
@param provider the ComponentProvider to parent and center the dialog over.
Ghidra/Features/Base/src/main/java/ghidra/app/util/AddEditDialog.java