flow like the river

BACK_BACK/node_modules/cosmiconfig/dist/cacheWrapper.js

@@ -0,0 +1,19 @@
+//      
+'use strict';
+
+function cacheWrapper   (cache                 , key        , fn         )    {
+  if (!cache) {
+    return fn();
+  }
+
+  const cached = cache.get(key);
+  if (cached !== undefined) {
+    return cached;
+  }
+
+  const result = fn();
+  cache.set(key, result);
+  return result;
+}
+
+module.exports = cacheWrapper;