function saveChanges( saveBundle, next ) {
        getDb(save, next);
        function save(db){
            var saveProcessor = new bmongo.MongoSaveHandler( db, saveBundle, next);
            saveProcessor.beforeSaveEntity   = function () { return true; };
            saveProcessor.beforeSaveEntities = function (callback) { callback();  };
            saveProcessor.save();
        }
    }
Breeze change-set save
@param saveBundle {object} a json "saveBundle" from a Breeze client
@param next {function} next(err, results)