htmlfieldassembler.php

См. документацию.

<?php
 
namespace Bitrix\Main\Grid\Row\Assembler\Field;
 
use Bitrix\Main\Grid\Row\FieldAssembler;
use Stringable;

class HtmlFieldAssembler extends FieldAssembler
{
    protected function prepareColumn($value): ?string
    {
        if (is_null($value))
        {
            return null;
        }
 
        if (
            is_scalar($value)
            || $value instanceof Stringable
        )
        {
            return (string)$value;
        }
 
        return '';
    }
}