public void setButtons(java.util.Collection<Button> buttons) {
        if (buttons == null) {
            this.buttons = null;
            return;
        }

        this.buttons = new java.util.ArrayList<Button>(buttons);
    }
<p>
A list of buttons that should be displayed on the response card. The arrangement of the buttons is determined by
the platform that displays the button.
</p>

@param buttons
       A list of buttons that should be displayed on the response card. The arrangement of the buttons is
       determined by the platform that displays the button.
aws-java-sdk-lexruntimev2/src/main/java/com/amazonaws/services/lexruntimev2/model/ImageResponseCard.java