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://docs.aws.amazon.com/cdk/api/v2/java/software/amazon/awscdk/services/appconfig/IExtension.Jsii$Default.html
IExtension.Jsii$Default (AWS CDK 2.253.0 API)
declaration: package: software.amazon.awscdk.services.appconfig, interface: IExtension, interface: Jsii$Default
aws cdkjsiidefaultapi
https://developers.arcgis.com/enterprise-sdk/api-reference/net/IExtension/
IExtension Interface | ArcGIS Enterprise SDK | Esri Developer
arcgis enterpriseinterfacesdkesrideveloper