0.2.0 - Mid migration

web/node_modules/@emotion/weak-memoize/src/index.js

@@ -0,0 +1,16 @@
+// @flow
+let weakMemoize = function<Arg, Return>(func: Arg => Return): Arg => Return {
+  // $FlowFixMe flow doesn't include all non-primitive types as allowed for weakmaps
+  let cache: WeakMap<Arg, Return> = new WeakMap()
+  return arg => {
+    if (cache.has(arg)) {
+      // $FlowFixMe
+      return cache.get(arg)
+    }
+    let ret = func(arg)
+    cache.set(arg, ret)
+    return ret
+  }
+}
+
+export default weakMemoize