original_string: public function getReturnCodeName($returnCode)
      {
          if (isset(self::$qosLevels[$returnCode])) {
              return self::$qosLevels[$returnCode][0];
          }
  
          return 'Unknown '.$returnCode;
      }
code: public function getReturnCodeName($returnCode)
      {
          if (isset(self::$qosLevels[$returnCode])) {
              return self::$qosLevels[$returnCode][0];
          }
  
          return 'Unknown '.$returnCode;
      }
code_tokens: public function getReturnCodeName ( $ returnCode ) { if ( isset ( self :: $ qosLevels [ $ returnCode ] ) ) { return self :: $ qosLevels [ $ returnCode ] [ 0 ] ; } return 'Unknown ' . $ returnCode ; }
docstring: Indicates if the given return code is an error.
  
  @param int $returnCode
  
  @return bool
docstring_tokens: Indicates if the given return code is an error .