public String getSubtitle() {
        return this.subtitle;
    }
<p>
The subtitle to display on the response card. The format of the subtitle is determined by the platform displaying
the response card.
</p>

@return The subtitle to display on the response card. The format of the subtitle is determined by the platform
        displaying the response card.
aws-java-sdk-lexruntimev2/src/main/java/com/amazonaws/services/lexruntimev2/model/ImageResponseCard.java