Class UniversalActionResponse

// A universal action that opens a link. const openLinkUniversalAction =     CardService.newUniversalActionResponseBuilder()         .setOpenLink(CardService.newOpenLink().setUrl('https://www.google.com'))         .build();  const cardBuilder1 = CardService.newCardBuilder(); const cardBuilder2 = CardService.newCardBuilder(); // Finish building the cards ...  // A universal action that shows two static cards. const cardsUniversalAction =     CardService.newUniversalActionResponseBuilder()         .displayAddOnCards([cardBuilder1.build(), cardBuilder2.build()])         .build();