preselecteditem.php

<?php
 
namespace Bitrix\UI\EntitySelector;
 
class PreselectedItem implements \JsonSerializable
{
    protected $id;
    protected $entityId;
    protected $item;
 
    public function __construct(array $options)
    {
        $id = $options['id'] ?? null;
        if ((is_string($id) && $id !== '') || is_int($id))
        {
            $this->id = $id;
        }
 
        $entityId = $options['entityId'] ?? null;
        if (is_string($entityId) && $entityId !== '')
        {
            $this->entityId = strtolower($entityId);
        }
    }
 
    public function getId()
    {
        return $this->id;
    }
 
    public function getEntityId(): string
    {
        return $this->entityId;
    }
 
    public function setItem(Item $item)
    {
        $this->item = $item;
    }
 
    public function getItem(): ?Item
    {
        return $this->item;
    }
 
    public function isLoaded()
    {
        return $this->getItem() !== null;
    }
 
    public function jsonSerialize()
    {
        return [$this->getEntityId(), $this->getId()];
    }
}