Configring node js.

node_modules/core-js/library/modules/es7.reflect.get-own-metadata.js

@@ -0,0 +1,9 @@
+var metadata               = require('./_metadata')
+  , anObject               = require('./_an-object')
+  , ordinaryGetOwnMetadata = metadata.get
+  , toMetaKey              = metadata.key;
+
+metadata.exp({getOwnMetadata: function getOwnMetadata(metadataKey, target /*, targetKey */){
+  return ordinaryGetOwnMetadata(metadataKey, anObject(target)
+    , arguments.length < 3 ? undefined : toMetaKey(arguments[2]));
+}});