code: public static function reconstructFromTokens(array &$tokens)
      {
          $str = '';
          foreach ($tokens as $token) {
              if (is_string($token)) {
                  $str .= $token;
              } else {
                  $str .= $token[1];
              }
          }
          return $str;
      }
docs: Reconstruct a string of source code from its constituent tokens
  
  @param array $tokens
  @return string