src/Utils/Filter/ConvertLiteral.php
public function filter($string)
    {
        $string = strtr($string, $this->getConvertTable());
        return '"libiconv"' == ICONV_IMPL ? iconv(
            'UTF-8',
            'ascii//ignore//translit',
            $string
        ) : $string;
    }
public function filter($string)
    {
        $string = strtr($string, $this->getConvertTable());
        return '"libiconv"' == ICONV_IMPL ? iconv(
            'UTF-8',
            'ascii//ignore//translit',
            $string
        ) : $string;
    }
Filter and return the value.

@param string $string The value to filter

@return string The filtered value