diff --git a/registry.js b/registry.js
index 64b2735d3bb5284bd2450bf0d06115c3de5dcf80..489ffa2f59a1d08d71826e2ceb0076d588636c7c 100644
--- a/registry.js
+++ b/registry.js
@@ -8,8 +8,9 @@
  * @format
  */
 
-'use strict';
+"use strict";
 
+/*::
 export type AssetDestPathResolver = 'android' | 'generic';
 
 export type PackagerAsset = {
@@ -25,17 +26,18 @@ export type PackagerAsset = {
   +resolver?: AssetDestPathResolver,
   ...
 };
+*/
 
-const assets: Array<PackagerAsset> = [];
+const assets/*::: Array<PackagerAsset>*/ = [];
 
-function registerAsset(asset: PackagerAsset): number {
+function registerAsset(asset/*::: PackagerAsset*/)/*::: number*/ {
   // `push` returns new array length, so the first asset will
   // get id 1 (not 0) to make the value truthy
   return assets.push(asset);
 }
 
-function getAssetByID(assetId: number): PackagerAsset {
+function getAssetByID(assetId/*::: number*/)/*::: PackagerAsset*/ {
   return assets[assetId - 1];
 }
 
-module.exports = {registerAsset, getAssetByID};
+module.exports = { registerAsset, getAssetByID };
