dataprovider.php

См. документацию.

<?php
 
namespace Bitrix\Main\Grid\Column;
 
use Bitrix\Main\Grid\Settings;

abstract class DataProvider
{
    private ?Settings $settings;

    public function __construct(?Settings $settings = null)
    {
        $this->settings = $settings;
    }

    final protected function getSettings(): Settings
    {
        return $this->settings;
    }

    protected function createColumn(string $columnId, array $params = []): Column
    {
        if (!isset($params['id']))
        {
            $params['id'] = $columnId;
        }
 
        return new Column($columnId, $params);
    }

    protected function createColumns(array $columns): array
    {
        $result = [];
 
        foreach ($columns as $id => $description)
        {
            $result[$id] = $this->createColumn($id, $description);
        }
 
        return $result;
    }

    abstract public function prepareColumns(): array;
}