We have removed the sample source codes for some of our Plug-ins from our Github （kintone/plugin-sdk/examples）, as they were using some unofficial APIs.
These include the following:
The zip files of our packaged plug-in files though are available in our Plug-in articles, so feel free to download and install them into your kintone environment. We are still keeping our sources open on Github for our other plug-ins.
Please share your views with us in the Community forums!