Gregwar\RST\Parser::isDirective PHP Method

Is this line a directive ?

protected isDirective ( string $line ) : boolean
$line	string	the line
return	boolean	true if it's a directive

    protected function isDirective($line)
    {
        return preg_match('/^\\.\\. (\\|(.+)\\| |)([^\\s]+)::(.*)$/mUsi', $line);
    }

Parser