This documentation is not using the current rendering mechanism and will be deleted by December 31st, 2020. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
There are still many features missing. We will try to complete them step by step.
Pull requests are welcome: ExtensionBuilder Github
If you have a missing feature which you consider useful in common use cases report it there.
If you want to participate in a great Open Source community, consider to contribute to the ExtensionBuilder and become a team member!