public CustomVerificationEmailTemplateMetadata withTemplateSubject(String templateSubject) {
        setTemplateSubject(templateSubject);
        return this;
    }
<p>
The subject line of the custom verification email.
</p>

@param templateSubject
       The subject line of the custom verification email.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-sesv2/src/main/java/com/amazonaws/services/simpleemailv2/model/CustomVerificationEmailTemplateMetadata.java