protected function getReplacementKeys(array $map = [])
    {
        $keys = empty($map) ? array_keys($this->model->new_value) : array_keys($map);
        return array_map(function($current) {
            return '{' . $current . '}';
        }, $keys);
    }
protected function getReplacementKeys(array $map = [])
    {
        $keys = empty($map) ? array_keys($this->model->new_value) : array_keys($map);
        return array_map(function($current) {
            return '{' . $current . '}';
        }, $keys);
    }
protected function getReplacementKeys ( array $ map = [ ] ) { $ keys = empty ( $ map ) ? array_keys ( $ this -> model -> new_value ) : array_keys ( $ map ) ; return array_map ( function ( $ current ) { return '{' . $ current . '}' ; } , $ keys ) ; }
Gets replacement keys

@param array $map
@return String
Gets replacement keys