public void setAttachmentId(String attachmentId) {
        this.attachmentId = attachmentId;
    }
<p>
The ID of the attachment to return. Attachment IDs are returned by the <a>DescribeCommunications</a> operation.
</p>

@param attachmentId
       The ID of the attachment to return. Attachment IDs are returned by the <a>DescribeCommunications</a>
       operation.
aws-java-sdk-support/src/main/java/com/amazonaws/services/support/model/DescribeAttachmentRequest.java