NamingHelper::loadCategoriesMap

private function loadCategoriesMap(): void
{
	$list = ItemCategoryTable::query()
		->setSelect(['*'])
		->exec()
	;

	while ($item = $list->fetchObject())
	{
		$category = new ItemCategory($item);

		$this->categories[$category->getId()] = $category;
	}

	$this->isCategoriesMapLoaded = true;
}