Examples of `protected virtual` members in old docs * https://developer.rhino3d.com/api/RhinoCommon/html/P_Rhino_PlugIns_PlugIn_LocalPlugInName.htm * https://developer.rhino3d.com/api/RhinoCommon/html/Overload_Rhino_PlugIns_PlugIn_ObjectPropertiesPages.htm PlugIn class in new docs is missing these members - http://mcneel-apidocs.herokuapp.com/api/rhinocommon/rhino.plugins.plugin