code: protected function applyFix(\SplFileInfo $file, Tokens $tokens)
      {
          for ($index = $tokens->count() - 4; $index > 0; --$index) {
              $candidate = $this->getReplaceCandidate($tokens, $index);
              if (null === $candidate) {
                  continue;
              }
  
              $this->fixFunctionCallToConstant(
                  $tokens,
                  $index,
                  $candidate[0], // brace open
                  $candidate[1], // brace close
                  $candidate[2]  // replacement
              );
          }
      }
docs: {@inheritdoc}