League\CommonMark\Inline\Parser\EmphasisParser::getCharacters PHP Метод

    public function getCharacters()
    {
        if (!$this->config->getConfig('enable_em') && !$this->config->getConfig('enable_strong')) {
            return [];
        }
        $chars = [];
        if ($this->config->getConfig('use_asterisk')) {
            $chars[] = '*';
        }
        if ($this->config->getConfig('use_underscore')) {
            $chars[] = '_';
        }
        return $chars;
    }