original_string: private function zSignatureExists($dom)
      {
          $signature = $dom->getElementsByTagName('Signature')->item(0);
          if (! isset($signature)) {
              return false;
          }
  
          return true;
      }
code: private function zSignatureExists($dom)
      {
          $signature = $dom->getElementsByTagName('Signature')->item(0);
          if (! isset($signature)) {
              return false;
          }
  
          return true;
      }
code_tokens: private function zSignatureExists ( $ dom ) { $ signature = $ dom -> getElementsByTagName ( 'Signature' ) -> item ( 0 ) ; if ( ! isset ( $ signature ) ) { return false ; } return true ; }
docstring: signatureExists
  Check se o xml possi a tag Signature.
  @param DOMDocument $dom
  @return bool
docstring_tokens: signatureExists Check se o xml possi a tag Signature .