public void setAttachmentId(String attachmentId) {
        this.attachmentId = attachmentId;
    }
<p>
A unique identifier for the attachment.
</p>

@param attachmentId
       A unique identifier for the attachment.
aws-java-sdk-connectparticipant/src/main/java/com/amazonaws/services/connectparticipant/model/StartAttachmentUploadResult.java