code: public static function fromCode($code)
      {
          $codeHash = self::calculateCodeHash($code);
  
          if (self::hasCache($codeHash)) {
              $tokens = self::getCache($codeHash);
  
              // generate the code to recalculate the hash
              $tokens->generateCode();
  
              if ($codeHash === $tokens->codeHash) {
                  $tokens->clearEmptyTokens();
                  $tokens->clearChanged();
  
                  return $tokens;
              }
          }
  
          $tokens = new self();
          $tokens->setCode($code);
          $tokens->clearChanged();
  
          return $tokens;
      }
docs: Create token collection directly from code.
  
  @param string $code PHP code
  
  @return Tokens