code: protected function applyFix(\SplFileInfo $file, Tokens $tokens)
      {
          for ($index = $tokens->count() - 1; $index > 1; --$index) {
              $token = $tokens[$index];
              if (!$token->isGivenKind(T_VARIABLE)) {
                  continue;
              }
  
              $prevIndex = $tokens->getPrevMeaningfulToken($index);
              $prevToken = $tokens[$prevIndex];
              if (!$prevToken->equals('$') && !$prevToken->isGivenKind(T_OBJECT_OPERATOR)) {
                  continue;
              }
  
              $openingBrace = CT::T_DYNAMIC_VAR_BRACE_OPEN;
              $closingBrace = CT::T_DYNAMIC_VAR_BRACE_CLOSE;
              if ($prevToken->isGivenKind(T_OBJECT_OPERATOR)) {
                  $openingBrace = CT::T_DYNAMIC_PROP_BRACE_OPEN;
                  $closingBrace = CT::T_DYNAMIC_PROP_BRACE_CLOSE;
              }
  
              $tokens->overrideRange($index, $index, [
                  new Token([$openingBrace, '{']),
                  new Token([T_VARIABLE, $token->getContent()]),
                  new Token([$closingBrace, '}']),
              ]);
          }
      }
docs: {@inheritdoc}