protected function _validateLoadable() {
        if ($this->_loadable) {
            return true;
        }
        if (!class_exists('Model_Snippet')) {
            throw new Exception(
                'The Snippet model could not be autoloaded. Spawn it first, dumbass!'
            );
        }
        $this->_loadable = true;
        return $this->_loadable;
    }