--- /dev/null
+var metadata = require('./_metadata')
+ , anObject = require('./_an-object')
+ , ordinaryOwnMetadataKeys = metadata.keys
+ , toMetaKey = metadata.key;
+
+metadata.exp({getOwnMetadataKeys: function getOwnMetadataKeys(target /*, targetKey */){
+ return ordinaryOwnMetadataKeys(anObject(target), arguments.length < 2 ? undefined : toMetaKey(arguments[1]));
+}});
\ No newline at end of file