src/vs/editor/contrib/linesOperations/browser/linesOperations.ts/DuplicateSelectionAction/constructor
class DuplicateSelectionAction:	constructor() {
		super({
			id: 'editor.action.duplicateSelection',
			label: nls.localize('duplicateSelection', "Duplicate Selection"),
			alias: 'Duplicate Selection',
			precondition: EditorContextKeys.writable,
			menuOpts: {
				menuId: MenuId.MenubarSelectionMenu,
				group: '2_line',
				title: nls.localize({ key: 'miDuplicateSelection', comment: ['&& denotes a mnemonic'] }, "&&Duplicate Selection"),
				order: 5
			}
		});
	}