code: func PluginSupports(supportedVersions ...string) PluginInfo {
  	if len(supportedVersions) < 1 {
  		panic("programmer error: you must support at least one version")
  	}
  	return &pluginInfo{
  		CNIVersion_:        Current(),
  		SupportedVersions_: supportedVersions,
  	}
  }
docs: // PluginSupports returns a new PluginInfo that will report the given versions
  // as supported