protected function cleanKey($key)
    {
        return mb_substr(
            $key,
            mb_strlen($this->preDelimiter),
            mb_strlen($key) - mb_strlen($this->postDelimiter) - 1
        );
    }
protected function cleanKey($key)
    {
        return mb_substr(
            $key,
            mb_strlen($this->preDelimiter),
            mb_strlen($key) - mb_strlen($this->postDelimiter) - 1
        );
    }
protected function cleanKey ( $ key ) { return mb_substr ( $ key , mb_strlen ( $ this -> preDelimiter ) , mb_strlen ( $ key ) - mb_strlen ( $ this -> postDelimiter ) - 1 ) ; }
Cleans the delimiters out of key.

@param string $key

@return string
Cleans the delimiters out of key .