PhpCsFixer\Tokenizer\Tokens::generateCode PHP Method

    public function generateCode()
    {
        $code = $this->generatePartialCode(0, count($this) - 1);
        $this->changeCodeHash(self::calculateCodeHash($code));
        return $code;
    }

 /**
  * {@inheritdoc}
  */
 public function fix(\SplFileInfo $file, Tokens $tokensOrg)
 {
     $content = $tokensOrg->generateCode();
     // replace all <? with <?php to replace all short open tags even without short_open_tag option enabled
     $newContent = preg_replace('/<\\?(\\s|$)/', '<?php$1', $content, -1, $count);
     if (!$count) {
         return;
     }
     /* the following code is magic to revert previous replacements which should NOT be replaced, for example incorrectly replacing
      * > echo '<? ';
      * with
      * > echo '<?php ';
      */
     $tokens = Tokens::fromCode($newContent);
     $tokensOldContent = '';
     $tokensOldContentLength = 0;
     foreach ($tokens as $token) {
         if ($token->isGivenKind(T_OPEN_TAG)) {
             $tokenContent = $token->getContent();
             if ('<?php' !== substr($content, $tokensOldContentLength, 5)) {
                 $tokenContent = '<? ';
             }
             $tokensOldContent .= $tokenContent;
             $tokensOldContentLength += strlen($tokenContent);
             continue;
         }
         if ($token->isGivenKind(array(T_COMMENT, T_DOC_COMMENT, T_CONSTANT_ENCAPSED_STRING, T_ENCAPSED_AND_WHITESPACE, T_STRING))) {
             $tokenContent = '';
             $tokenContentLength = 0;
             $parts = explode('<?php', $token->getContent());
             $iLast = count($parts) - 1;
             foreach ($parts as $i => $part) {
                 $tokenContent .= $part;
                 $tokenContentLength += strlen($part);
                 if ($i !== $iLast) {
                     if ('<?php' === substr($content, $tokensOldContentLength + $tokenContentLength, 5)) {
                         $tokenContent .= '<?php';
                         $tokenContentLength += 5;
                     } else {
                         $tokenContent .= '<?';
                         $tokenContentLength += 2;
                     }
                 }
             }
             $token->setContent($tokenContent);
         }
         $tokensOldContent .= $token->getContent();
         $tokensOldContentLength += strlen($token->getContent());
     }
     $tokensOrg->overrideRange(0, $tokensOrg->count() - 1, $tokens);
 }