# vpnaas.py

Vpnaas扩展类，继承自extensions.ExtensionDescriptor，提供安全组扩展支持。

VPNPluginBase抽象基础类，继承自service\_base.ServicePluginBase，定义对vpn服务进行管理操作的接口。这个类被vpn\_db.py中的VPNPluginDb类继承。


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