<?php

namespace PSX\Model\SchemaOrg;

/**
 * @Description("An list item, e.g. a step in a checklist or how-to description.")
 */
class ListItem extends Intangible implements \JsonSerializable
{
    /** @var int|string|null */
    protected $position;

    /** @var ListItem|null */
    protected $previousItem;

    /** @var Thing|null */
    protected $item;

    /** @var ListItem|null */
    protected $nextItem;

    /**
     * @param int|string|null $position
     */
    public function setPosition($position): void
    {
        $this->position = $position;
    }

    /**
     * @return int|string|null
     */
    public function getPosition()
    {
        return $this->position;
    }

    /**
     * @param ListItem|null $previousItem
     */
    public function setPreviousItem(?ListItem $previousItem): void
    {
        $this->previousItem = $previousItem;
    }

    /**
     * @return ListItem|null
     */
    public function getPreviousItem(): ?ListItem
    {
        return $this->previousItem;
    }

    /**
     * @param Thing|null $item
     */
    public function setItem(?Thing $item): void
    {
        $this->item = $item;
    }

    /**
     * @return Thing|null
     */
    public function getItem(): ?Thing
    {
        return $this->item;
    }

    /**
     * @param ListItem|null $nextItem
     */
    public function setNextItem(?ListItem $nextItem): void
    {
        $this->nextItem = $nextItem;
    }

    /**
     * @return ListItem|null
     */
    public function getNextItem(): ?ListItem
    {
        return $this->nextItem;
    }

    public function jsonSerialize()
    {
        return (object) array_merge((array) parent::jsonSerialize(), array_filter(array('position' => $this->position, 'previousItem' => $this->previousItem, 'item' => $this->item, 'nextItem' => $this->nextItem), static function ($value) : bool {
            return $value !== null;
        }));
    }
}
__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MTM4NzAxOTM3NjQzMjk2OSA3NTY1Nzk0MTE5NTgzNTQwIDYxODk2MDc3MTM5NzM5MDU=