src/vs/platform/extensionManagement/node/extensionsScanner.ts/ExtensionsScanner/setMetadata
class ExtensionsScanner:	private setMetadata(local: IRelaxedLocalExtension, metadata: IMetadata): void {
		local.publisherDisplayName = metadata.publisherDisplayName || null;
		local.publisherId = metadata.publisherId || null;
		local.identifier.uuid = metadata.id;
		local.isMachineScoped = !!metadata.isMachineScoped;
		local.isBuiltin = local.type === ExtensionType.System || !!metadata.isBuiltin;
	}