protected function _saveRequestForModification($request, $i) {
        if (array_key_exists('method', $request)) {
            $methodParts = explode('.', $request['method']);
            $method = array_pop($methodParts);
            if (in_array($method, array('fetch', 'create', 'update', 'destroy'))) {
                $this->_postModifyMethods[$i] = $method;
                $this->_originalRequests[$i] = $request;
            }
        }
    }