https://learn.microsoft.com/zh-tw/dotnet/api/microsoft.office.tools.iextension.extensionbase?view=vsto-2022
IExtension.ExtensionBase Property (Microsoft.Office.Tools) | Microsoft Learn
Gets the object that is being extended by this IExtension.
microsoft officepropertytoolslearn
https://extensions.joomla.org/extension/disable-mootools/
Disable Mootools, by ExtensionBase - Joomla Extension Directory
Sometimes you need to disable Mootools Library or jQuery Library to prevent your site / page(s) from multiple loading of jQuery of Mootools Libraries
joomla extensiondisablemootoolsdirectory