private function parseTokens()
    {
        $this->tokens = $this->tokenStore->getTokens($this->tokenMask);
        $this->keys = array_keys($this->tokens);
        $this->keyLengths = array_unique(array_map('strlen', $this->keys));
        arsort($this->keyLengths);
        $this->maxLen = reset($this->keyLengths);
    }