the documentation on how to create a Qml extension plugin and use it in an application is unclear and scattered

The documentation on how to create a Qml extension plugin and use it in an application is unclear and scattered. There should be an example that combines both the plugin project and the application project that uses that plugin. It would be good to have a clear guide through the process, preferable for both static and dynamic plugins.

There is 'TimeExample', but there should also be an example project using the plugin. http://doc.qt.io/qt-5/qtqml-modules-cppplugins.html#plugin-example