@Override
    public AssociateClientVpnTargetNetworkResult associateClientVpnTargetNetwork(AssociateClientVpnTargetNetworkRequest request) {
        request = beforeClientExecution(request);
        return executeAssociateClientVpnTargetNetwork(request);
    }
<p>
Associates a target network with a Client VPN endpoint. A target network is a subnet in a VPC. You can associate
multiple subnets from the same VPC with a Client VPN endpoint. You can associate only one subnet in each
Availability Zone. We recommend that you associate at least two subnets to provide Availability Zone redundancy.
</p>
<p>
If you specified a VPC when you created the Client VPN endpoint or if you have previous subnet associations, the
specified subnet must be in the same VPC. To specify a subnet that's in a different VPC, you must first modify
the Client VPN endpoint (<a>ModifyClientVpnEndpoint</a>) and change the VPC that's associated with it.
</p>

@param associateClientVpnTargetNetworkRequest
@return Result of the AssociateClientVpnTargetNetwork operation returned by the service.
@sample AmazonEC2.AssociateClientVpnTargetNetwork
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/ec2-2016-11-15/AssociateClientVpnTargetNetwork"
     target="_top">AWS API Documentation</a>
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/AmazonEC2Client.java