code: protected function optimizedFilter($filterRule, $children, $operation)
      {
          $procedure = new FilterBuilderSql($this->getMetaModel()->getTableName(), $operation, $this->connection);
          $skipped   = $this->buildNativeSqlProcedure($procedure, $children);
  
          if (!$procedure->isEmpty()) {
              $filterRule->addChild($this->getMetaModel()->getEmptyFilter()->addFilterRule($procedure->build()));
          }
  
          return $skipped;
      }
docs: Method to optimize as many system column lookup filters as possible into a combined filter rule.
  
  @param ConditionAnd|ConditionOr $filterRule The filter to which the optimized rule shall be added to.
  
  @param array                    $children   The children to parse.
  
  @param string                   $operation  The operation to parse (AND or OR).
  
  @return array