code: public static function setKindOfReportLog(string $sKindOfReportLog)
      {
          if ($sKindOfReportLog === 'screen' || $sKindOfReportLog === 'all') { self::$_sKindOfReportLog = $sKindOfReportLog; }
          else { self::$_sKindOfReportLog = 'error_log'; }
      }
docs: set the kind of report Log
  
  @access public
  @param  string $sKindOfReportLog
  @return void