src/vs/editor/contrib/codeAction/browser/codeActionCommands.ts/RefactorPreview/constructor
class RefactorPreview:	constructor() {
		super({
			id: refactorPreviewCommandId,
			label: nls.localize('refactor.preview.label', "Refactor with Preview..."),
			alias: 'Refactor Preview...',
			precondition: ContextKeyExpr.and(EditorContextKeys.writable, EditorContextKeys.hasCodeActionsProvider),
			description: {
				description: 'Refactor Preview...',
				args: [{ name: 'args', schema: argsSchema }]
			}
		});
	}