public EmailSettings withEmailSubject(String emailSubject) {
        setEmailSubject(emailSubject);
        return this;
    }
<p>
The contents of the subject line of the email message.
</p>

@param emailSubject
       The contents of the subject line of the email message.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-amplifybackend/src/main/java/com/amazonaws/services/amplifybackend/model/EmailSettings.java