@Override
    public CreateTransitGatewayVpcAttachmentResult createTransitGatewayVpcAttachment(CreateTransitGatewayVpcAttachmentRequest request) {
        request = beforeClientExecution(request);
        return executeCreateTransitGatewayVpcAttachment(request);
    }
<p>
Attaches the specified VPC to the specified transit gateway.
</p>
<p>
If you attach a VPC with a CIDR range that overlaps the CIDR range of a VPC that is already attached, the new VPC
CIDR range is not propagated to the default propagation route table.
</p>
<p>
To send VPC traffic to an attached transit gateway, add a route to the VPC route table using <a>CreateRoute</a>.
</p>

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