src/vs/workbench/contrib/extensions/browser/extensionsWorkbenchService.ts/ExtensionsWorkbenchService/_reportTelemetry
class ExtensionsWorkbenchService:	private _reportTelemetry() {
		const extensionIds = this.installed.filter(extension =>
			extension.type === ExtensionType.User &&
			(extension.enablementState === EnablementState.EnabledWorkspace ||
				extension.enablementState === EnablementState.EnabledGlobally))
			.map(extension => ExtensionIdentifier.toKey(extension.identifier.id));
		this.telemetryService.publicLog2<InstalledExtensionsEvent, ExtensionsLoadClassification>('installedExtensions', { extensionIds: extensionIds.join(';'), count: extensionIds.length });
	}