src/vs/platform/extensionManagement/common/extensionsScannerService.ts/AbstractExtensionsScannerService/scanAllExtensions
class AbstractExtensionsScannerService:	async scanAllExtensions(systemScanOptions: ScanOptions, userScanOptions: ScanOptions, includeExtensionsUnderDev: boolean): Promise<IScannedExtension[]> {
		const [system, user] = await Promise.all([
			this.scanSystemExtensions(systemScanOptions),
			this.scanUserExtensions(userScanOptions),
		]);
		const development = includeExtensionsUnderDev ? await this.scanExtensionsUnderDevelopment(systemScanOptions, [...system, ...user]) : [];
		return this.dedupExtensions(system, user, development, await this.getTargetPlatform(), true);
	}