public VpnConnection withCoreNetworkAttachmentArn(String coreNetworkAttachmentArn) {
        setCoreNetworkAttachmentArn(coreNetworkAttachmentArn);
        return this;
    }
<p>
The ARN of the core network attachment.
</p>

@param coreNetworkAttachmentArn
       The ARN of the core network attachment.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/VpnConnection.java