PhpCsFixer\Fixer\LanguageConstruct\CombineConsecutiveUnsetsFixer::fix PHP Method

    public function fix(\SplFileInfo $file, Tokens $tokens)
    {
        for ($index = $tokens->count() - 1; $index >= 0; --$index) {
            if (!$tokens[$index]->isGivenKind(T_UNSET)) {
                continue;
            }
            $previousUnsetCall = $this->getPreviousUnsetCall($tokens, $index);
            if (is_int($previousUnsetCall)) {
                $index = $previousUnsetCall;
                continue;
            }
            list($previousUnset, , $previousUnsetBraceEnd) = $previousUnsetCall;
            // Merge the tokens inside the 'unset' call into the previous one 'unset' call.
            $tokensAddCount = $this->moveTokens($tokens, $nextUnsetContentStart = $tokens->getNextTokenOfKind($index, array('(')), $nextUnsetContentEnd = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $nextUnsetContentStart), $previousUnsetBraceEnd - 1);
            if (!$tokens[$previousUnsetBraceEnd]->isWhitespace()) {
                $tokens->insertAt($previousUnsetBraceEnd, new Token(array(T_WHITESPACE, ' ')));
                ++$tokensAddCount;
            }
            $tokens->insertAt($previousUnsetBraceEnd, new Token(','));
            ++$tokensAddCount;
            // Remove 'unset', '(', ')' and (possibly) ';' from the merged 'unset' call.
            $this->clearOffsetTokens($tokens, $tokensAddCount, array($index, $nextUnsetContentStart, $nextUnsetContentEnd));
            $nextUnsetSemicolon = $tokens->getNextMeaningfulToken($nextUnsetContentEnd);
            if (null !== $nextUnsetSemicolon && $tokens[$nextUnsetSemicolon]->equals(';')) {
                $tokens->clearTokenAndMergeSurroundingWhitespace($nextUnsetSemicolon);
            }
            $index = $previousUnset + 1;
        }
    }