transform and pass through the existing store

storage/LogStore.js

@@ -8,11 +8,12 @@ var create = module.exports.create = function(filePath, backingStore) {
 
     var file = Fs.createWriteStream(filePath, {flags: 'a+'});
 
-    return {
-        message: function(channel, msg, callback) {
+    var originalMessageFunction = backingStore.message;
+
+    backingStore.message = function(channel, msg, callback) {
         message(file, msg);
-            backingStore.message(channel, msg, callback);
-        },
-        getMessages: backingStore.getMessages
+        originalMessageFunction(channel, msg, callback);
     };
+
+    return backingStore;
 };