public void setRegistrationAttachmentId(String registrationAttachmentId) {
        this.registrationAttachmentId = registrationAttachmentId;
    }
<p>
The unique identifier for the registration attachment.
</p>

@param registrationAttachmentId
       The unique identifier for the registration attachment.
aws-java-sdk-pinpointsmsvoicev2/src/main/java/com/amazonaws/services/pinpointsmsvoicev2/model/PutRegistrationFieldValueRequest.java