code: protected function skipRowsClause() {
          $skipClause = [];
          foreach ($this->skipRows as $cl => $val) {
              $skipClause[] = ['<>', $cl, $val];
          }
          if (count($skipClause) > 1) array_unshift($skipClause, 'and');
  
         return $skipClause;
      }
docs: Returns a clause to be used in queries to omit rows which supposed to be skipped in accordance to config.
  
  @return array