kartik\grid\ColumnTrait::setPageRows PHP Method

    protected function setPageRows()
    {
        if ($this->grid->showPageSummary && isset($this->pageSummary) && $this->pageSummary !== false && !is_string($this->pageSummary)) {
            $provider = $this->grid->dataProvider;
            $models = array_values($provider->getModels());
            $keys = $provider->getKeys();
            foreach ($models as $index => $model) {
                $key = $keys[$index];
                $this->_rows[] = $this->getDataCellValue($model, $key, $index);
            }
        }
    }