public void setDomainId(String domainId) {
        this.domainId = domainId;
    }
<p>
The identifier of the domain that contains the speaker.
</p>

@param domainId
       The identifier of the domain that contains the speaker.
aws-java-sdk-voiceid/src/main/java/com/amazonaws/services/voiceid/model/DescribeSpeakerRequest.java