PhpCsFixer\Fixer\Operator\ConcatSpaceFixer::fix PHP Method

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        $callBack = $this->fixCallback;
        for ($index = $tokens->count() - 1; $index >= 0; --$index) {
            if ($tokens[$index]->equals('.')) {
                $this->{$callBack}($tokens, $index);
            }
        }
    }