public GenericAttachment withSubTitle(String subTitle) {
        setSubTitle(subTitle);
        return this;
    }
<p>
The subtitle shown below the title.
</p>

@param subTitle
       The subtitle shown below the title.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lex/src/main/java/com/amazonaws/services/lexruntime/model/GenericAttachment.java