public String getTransportTransitGatewayAttachmentId() {
        return this.transportTransitGatewayAttachmentId;
    }
<p>
The transit gateway attachment ID in use for the VPN tunnel.
</p>

@return The transit gateway attachment ID in use for the VPN tunnel.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/VpnConnectionOptions.java