code: protected function applyFix(\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, ['(']),
                  $nextUnsetContentEnd = $tokens->findBlockEnd(Tokens::BLOCK_TYPE_PARENTHESIS_BRACE, $nextUnsetContentStart),
                  $previousUnsetBraceEnd - 1
              );
  
              if (!$tokens[$previousUnsetBraceEnd]->isWhitespace()) {
                  $tokens->insertAt($previousUnsetBraceEnd, new Token([T_WHITESPACE, ' ']));
                  ++$tokensAddCount;
              }
  
              $tokens->insertAt($previousUnsetBraceEnd, new Token(','));
              ++$tokensAddCount;
  
              // Remove 'unset', '(', ')' and (possibly) ';' from the merged 'unset' call.
              $this->clearOffsetTokens($tokens, $tokensAddCount, [$index, $nextUnsetContentStart, $nextUnsetContentEnd]);
  
              $nextUnsetSemicolon = $tokens->getNextMeaningfulToken($nextUnsetContentEnd);
              if (null !== $nextUnsetSemicolon && $tokens[$nextUnsetSemicolon]->equals(';')) {
                  $tokens->clearTokenAndMergeSurroundingWhitespace($nextUnsetSemicolon);
              }
  
              $index = $previousUnset + 1;
          }
      }
docs: {@inheritdoc}