public void setCards(java.util.Collection<Card> cards) {
        if (cards == null) {
            this.cards = null;
            return;
        }

        this.cards = new java.util.ArrayList<Card>(cards);
    }
<p>
The cards that make up the Q App, such as text input, file upload, or query cards.
</p>

@param cards
       The cards that make up the Q App, such as text input, file upload, or query cards.
aws-java-sdk-qapps/src/main/java/com/amazonaws/services/qapps/model/AppDefinition.java