function calculateExtensionPointIndex(mExtensionPointInfo) {
		let iIndex = mExtensionPointInfo.index;
		if (mExtensionPointInfo.referencedExtensionPoint) {
			iIndex += calculateExtensionPointIndex(mExtensionPointInfo.referencedExtensionPoint);
		}
		return iIndex;
	}
Change handler for adding XML at extension point.

@alias sap.ui.fl.changeHandler.AddXMLAtExtensionPoint
@author SAP SE
@version ${version}
@since 1.75
@private